[
  {
    "title": "Mona Lisa",
    "title_original": "La Gioconda",
    "date": "c. 1503–1519",
    "medium": "Oil on poplar panel",
    "dimensions": "77 × 53 cm",
    "current_location": "Louvre, Paris",
    "type": "painting",
    "era": "late",
    "subject": "portrait",
    "attribution": "accepted",
    "commons_filename": "Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg",
    "famous": true,
    "id": 1,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/e/ec/Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg/960px-Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg",
    "image_width": 7479,
    "image_height": 11146,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Mona_Lisa",
    "year_start": 1503,
    "year_end": 1519,
    "circa": true,
    "slug": "mona-lisa",
    "tier": "famous",
    "held_at": "Louvre, Paris"
  },
  {
    "title": "The Last Supper",
    "title_original": "Il Cenacolo",
    "date": "c. 1495–1498",
    "medium": "Tempera on gesso, pitch and mastic",
    "dimensions": "460 × 880 cm",
    "current_location": "Santa Maria delle Grazie, Milan",
    "type": "painting",
    "era": "middle",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "The_Last_Supper_-_Leonardo_Da_Vinci_-_High_Resolution_32x16.jpg",
    "famous": true,
    "id": 2,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/4/48/The_Last_Supper_-_Leonardo_Da_Vinci_-_High_Resolution_32x16.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/48/The_Last_Supper_-_Leonardo_Da_Vinci_-_High_Resolution_32x16.jpg/960px-The_Last_Supper_-_Leonardo_Da_Vinci_-_High_Resolution_32x16.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:The_Last_Supper_-_Leonardo_Da_Vinci_-_High_Resolution_32x16.jpg",
    "image_width": 9600,
    "image_height": 4800,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/The_Last_Supper_(Leonardo)",
    "year_start": 1495,
    "year_end": 1498,
    "circa": true,
    "see_also": [
      {
        "label": "Giampietrino copy (c. 1520)",
        "attribution": "by Giampietrino, Leonardo's student",
        "location": "Royal Academy, London",
        "note": "Painted while the original was still fresh, preserves details the wall painting has lost (Christ's feet, salt cellar, expressions). Considered the most reliable visual record.",
        "image_url": "https://upload.wikimedia.org/wikipedia/commons/1/11/Giampietrino-Last-Supper-ca-1520.jpg",
        "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Giampietrino-Last-Supper-ca-1520.jpg/500px-Giampietrino-Last-Supper-ca-1520.jpg",
        "commons_page": "https://commons.wikimedia.org/wiki/File:Giampietrino-Last-Supper-ca-1520.jpg",
        "image_width": 2100,
        "image_height": 800
      },
      {
        "label": "Cesare da Sesto copy (c. 1520)",
        "attribution": "by Cesare da Sesto, Leonardo workshop",
        "location": "Church of San Marco, Vercelli",
        "image_url": "https://upload.wikimedia.org/wikipedia/commons/8/86/Cesare_da_Sesto_-_Ultima_Cena_%28copia%29.jpg",
        "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Cesare_da_Sesto_-_Ultima_Cena_%28copia%29.jpg/500px-Cesare_da_Sesto_-_Ultima_Cena_%28copia%29.jpg",
        "commons_page": "https://commons.wikimedia.org/wiki/File:Cesare_da_Sesto_-_Ultima_Cena_(copia).jpg",
        "image_width": 2974,
        "image_height": 1600
      },
      {
        "label": "Raphael Morghen engraving (1800)",
        "attribution": "engraving after Leonardo",
        "location": "Rijksmuseum, Amsterdam (this impression)",
        "note": "Incredibly detailed copper engraving — 32MP Rijksmuseum scan.",
        "image_url": "https://upload.wikimedia.org/wikipedia/commons/f/fc/Het_laatste_avondmaal%2C_RP-P-OB-70.879.jpg",
        "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Het_laatste_avondmaal%2C_RP-P-OB-70.879.jpg/500px-Het_laatste_avondmaal%2C_RP-P-OB-70.879.jpg",
        "commons_page": "https://commons.wikimedia.org/wiki/File:Het_laatste_avondmaal,_RP-P-OB-70.879.jpg",
        "image_width": 7282,
        "image_height": 4518
      }
    ],
    "slug": "the-last-supper",
    "tier": "famous",
    "held_at": "Santa Maria delle Grazie, Milan"
  },
  {
    "title": "Virgin of the Rocks (Louvre version)",
    "title_original": "La Vergine delle rocce",
    "date": "c. 1483–1486",
    "medium": "Oil on panel, transferred to canvas",
    "dimensions": "199 × 122 cm",
    "current_location": "Louvre, Paris",
    "type": "painting",
    "era": "middle",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "Leonardo_Da_Vinci_-_Vergine_delle_Rocce_(Louvre).jpg",
    "famous": true,
    "id": 3,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/e/e4/Leonardo_Da_Vinci_-_Vergine_delle_Rocce_%28Louvre%29.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Leonardo_Da_Vinci_-_Vergine_delle_Rocce_%28Louvre%29.jpg/960px-Leonardo_Da_Vinci_-_Vergine_delle_Rocce_%28Louvre%29.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Leonardo_Da_Vinci_-_Vergine_delle_Rocce_(Louvre).jpg",
    "image_width": 3460,
    "image_height": 5487,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Virgin_of_the_Rocks",
    "year_start": 1483,
    "year_end": 1486,
    "circa": true,
    "slug": "virgin-of-the-rocks-louvre-version",
    "tier": "famous",
    "held_at": "Louvre, Paris"
  },
  {
    "title": "Virgin of the Rocks (London version)",
    "date": "c. 1495–1508",
    "medium": "Oil on panel",
    "dimensions": "189.5 × 120 cm",
    "current_location": "National Gallery, London",
    "type": "painting",
    "era": "middle",
    "subject": "religious",
    "attribution": "accepted (partly workshop)",
    "commons_filename": "Leonardo_da_Vinci_Virgin_of_the_Rocks_(National_Gallery_London).jpg",
    "famous": true,
    "id": 4,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/4/49/Leonardo_da_Vinci_Virgin_of_the_Rocks_%28National_Gallery_London%29.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Leonardo_da_Vinci_Virgin_of_the_Rocks_%28National_Gallery_London%29.jpg/960px-Leonardo_da_Vinci_Virgin_of_the_Rocks_%28National_Gallery_London%29.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_Virgin_of_the_Rocks_(National_Gallery_London).jpg",
    "image_width": 2692,
    "image_height": 4150,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Virgin_of_the_Rocks",
    "year_start": 1495,
    "year_end": 1508,
    "circa": true,
    "slug": "virgin-of-the-rocks-london-version",
    "tier": "famous",
    "held_at": "National Gallery, London"
  },
  {
    "title": "Lady with an Ermine",
    "title_original": "Dama con l'ermellino",
    "date": "c. 1489–1491",
    "medium": "Oil on walnut panel",
    "dimensions": "54 × 39 cm",
    "current_location": "Czartoryski Museum, Kraków",
    "type": "painting",
    "era": "middle",
    "subject": "portrait",
    "attribution": "accepted",
    "commons_filename": "Lady_with_an_Ermine_-_Leonardo_da_Vinci_-_Google_Art_Project.jpg",
    "famous": true,
    "id": 5,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/f/f9/Lady_with_an_Ermine_-_Leonardo_da_Vinci_-_Google_Art_Project.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Lady_with_an_Ermine_-_Leonardo_da_Vinci_-_Google_Art_Project.jpg/960px-Lady_with_an_Ermine_-_Leonardo_da_Vinci_-_Google_Art_Project.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Lady_with_an_Ermine_-_Leonardo_da_Vinci_-_Google_Art_Project.jpg",
    "image_width": 30894,
    "image_height": 41545,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Lady_with_an_Ermine",
    "year_start": 1489,
    "year_end": 1491,
    "circa": true,
    "slug": "lady-with-an-ermine",
    "tier": "famous",
    "held_at": "Czartoryski Museum, Kraków"
  },
  {
    "title": "Ginevra de' Benci",
    "date": "c. 1474–1478",
    "medium": "Oil on panel",
    "dimensions": "38.1 × 37 cm",
    "current_location": "National Gallery of Art, Washington",
    "type": "painting",
    "era": "early",
    "subject": "portrait",
    "attribution": "accepted",
    "commons_filename": "Leonardo_da_Vinci_-_Ginevra_de'_Benci_-_Google_Art_Project.jpg",
    "famous": true,
    "id": 6,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/3/39/Leonardo_da_Vinci_-_Ginevra_de%27_Benci_-_Google_Art_Project.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Leonardo_da_Vinci_-_Ginevra_de%27_Benci_-_Google_Art_Project.jpg/960px-Leonardo_da_Vinci_-_Ginevra_de%27_Benci_-_Google_Art_Project.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_-_Ginevra_de%27_Benci_-_Google_Art_Project.jpg",
    "image_width": 10483,
    "image_height": 11110,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Ginevra_de%27_Benci",
    "year_start": 1474,
    "year_end": 1478,
    "circa": true,
    "slug": "ginevra-de-benci",
    "tier": "famous",
    "held_at": "National Gallery of Art, Washington"
  },
  {
    "title": "Annunciation",
    "title_original": "Annunciazione",
    "date": "c. 1472–1475",
    "medium": "Oil and tempera on panel",
    "dimensions": "98 × 217 cm",
    "current_location": "Uffizi, Florence",
    "type": "painting",
    "era": "early",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "L'Annonciation,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg",
    "famous": true,
    "id": 7,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/a/a3/L%27Annonciation%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/L%27Annonciation%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg/960px-L%27Annonciation%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:L%27Annonciation,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg",
    "image_width": 18917,
    "image_height": 4388,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Annunciation_(Leonardo)",
    "year_start": 1472,
    "year_end": 1475,
    "circa": true,
    "slug": "annunciation",
    "tier": "famous",
    "held_at": "Uffizi, Florence"
  },
  {
    "title": "Benois Madonna",
    "date": "c. 1478–1480",
    "medium": "Oil on canvas, transferred from panel",
    "dimensions": "48 × 31 cm",
    "current_location": "Hermitage Museum, St Petersburg",
    "type": "painting",
    "era": "early",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "Benois_Madonna_by_Leonardo_Da_Vinci_1478-1480_-_panoramio.jpg",
    "famous": true,
    "id": 8,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/0/05/Benois_Madonna_by_Leonardo_Da_Vinci_1478-1480_-_panoramio.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/Benois_Madonna_by_Leonardo_Da_Vinci_1478-1480_-_panoramio.jpg/960px-Benois_Madonna_by_Leonardo_Da_Vinci_1478-1480_-_panoramio.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Benois_Madonna_by_Leonardo_Da_Vinci_1478-1480_-_panoramio.jpg",
    "image_width": 3456,
    "image_height": 4608,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Benois_Madonna",
    "year_start": 1478,
    "year_end": 1480,
    "circa": true,
    "slug": "benois-madonna",
    "tier": "famous",
    "held_at": "Hermitage Museum, St Petersburg"
  },
  {
    "title": "Saint John the Baptist",
    "date": "c. 1513–1516",
    "medium": "Oil on walnut wood",
    "dimensions": "69 × 57 cm",
    "current_location": "Louvre, Paris",
    "type": "painting",
    "era": "late",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "Leonardo_da_Vinci_-_Saint_John_the_Baptist_C2RMF_retouched.jpg",
    "famous": true,
    "id": 9,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/b/b8/Leonardo_da_Vinci_-_Saint_John_the_Baptist_C2RMF_retouched.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Leonardo_da_Vinci_-_Saint_John_the_Baptist_C2RMF_retouched.jpg/960px-Leonardo_da_Vinci_-_Saint_John_the_Baptist_C2RMF_retouched.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_-_Saint_John_the_Baptist_C2RMF_retouched.jpg",
    "image_width": 10446,
    "image_height": 13522,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Saint_John_the_Baptist_(Leonardo)",
    "year_start": 1513,
    "year_end": 1516,
    "circa": true,
    "slug": "saint-john-the-baptist",
    "tier": "famous",
    "held_at": "Louvre, Paris"
  },
  {
    "title": "Virgin and Child with Saint Anne",
    "date": "c. 1503–1519",
    "medium": "Oil on poplar panel",
    "dimensions": "168 × 130 cm",
    "current_location": "Louvre, Paris",
    "type": "painting",
    "era": "late",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "Leonardo_da_Vinci_-_Virgin_and_Child_with_St_Anne_C2RMF_retouched.jpg",
    "famous": true,
    "id": 10,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/4/44/Leonardo_da_Vinci_-_Virgin_and_Child_with_St_Anne_C2RMF_retouched.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/Leonardo_da_Vinci_-_Virgin_and_Child_with_St_Anne_C2RMF_retouched.jpg/960px-Leonardo_da_Vinci_-_Virgin_and_Child_with_St_Anne_C2RMF_retouched.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_-_Virgin_and_Child_with_St_Anne_C2RMF_retouched.jpg",
    "image_width": 13295,
    "image_height": 17828,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/The_Virgin_and_Child_with_Saint_Anne_(Leonardo)",
    "year_start": 1503,
    "year_end": 1519,
    "circa": true,
    "slug": "virgin-and-child-with-saint-anne",
    "tier": "famous",
    "held_at": "Louvre, Paris"
  },
  {
    "title": "Madonna of the Carnation",
    "date": "c. 1478–1480",
    "medium": "Oil on panel",
    "dimensions": "62 × 47 cm",
    "current_location": "Alte Pinakothek, Munich",
    "type": "painting",
    "era": "early",
    "subject": "religious",
    "attribution": "accepted",
    "commons_filename": "Madonna_of_the_Carnation_-_Leonardo_da_Vinci.jpg",
    "famous": true,
    "id": 11,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/8/80/Madonna_of_the_Carnation_-_Leonardo_da_Vinci.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/80/Madonna_of_the_Carnation_-_Leonardo_da_Vinci.jpg/960px-Madonna_of_the_Carnation_-_Leonardo_da_Vinci.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Madonna_of_the_Carnation_-_Leonardo_da_Vinci.jpg",
    "image_width": 4736,
    "image_height": 6400,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Madonna_of_the_Carnation",
    "year_start": 1478,
    "year_end": 1480,
    "circa": true,
    "slug": "madonna-of-the-carnation",
    "tier": "famous",
    "held_at": "Alte Pinakothek, Munich"
  },
  {
    "title": "La Belle Ferronnière",
    "date": "c. 1490–1497",
    "medium": "Oil on walnut panel",
    "dimensions": "62 × 44 cm",
    "current_location": "Louvre, Paris",
    "type": "painting",
    "era": "middle",
    "subject": "portrait",
    "attribution": "accepted",
    "commons_filename": "La_Belle_Ferronière_-_Google_Arts.jpg",
    "famous": true,
    "id": 12,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/4/4d/La_Belle_Ferroni%C3%A8re_-_Google_Arts.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/La_Belle_Ferroni%C3%A8re_-_Google_Arts.jpg/960px-La_Belle_Ferroni%C3%A8re_-_Google_Arts.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:La_Belle_Ferroni%C3%A8re_-_Google_Arts.jpg",
    "image_width": 2758,
    "image_height": 4000,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/La_Belle_Ferronni%C3%A8re",
    "year_start": 1490,
    "year_end": 1497,
    "circa": true,
    "slug": "la-belle-ferronniere",
    "tier": "famous",
    "held_at": "Louvre, Paris"
  },
  {
    "title": "Portrait of a Musician",
    "date": "c. 1483–1487",
    "medium": "Oil on walnut panel",
    "dimensions": "43 × 31 cm",
    "current_location": "Pinacoteca Ambrosiana, Milan",
    "type": "painting",
    "era": "middle",
    "subject": "portrait",
    "attribution": "accepted (partly workshop)",
    "commons_filename": "Leonardo_da_Vinci_-_Portrait_of_a_Musician_-_Pinacoteca_Ambrosiana.jpg",
    "famous": true,
    "id": 13,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/6/6a/Leonardo_da_Vinci_-_Portrait_of_a_Musician_-_Pinacoteca_Ambrosiana.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Leonardo_da_Vinci_-_Portrait_of_a_Musician_-_Pinacoteca_Ambrosiana.jpg/960px-Leonardo_da_Vinci_-_Portrait_of_a_Musician_-_Pinacoteca_Ambrosiana.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_-_Portrait_of_a_Musician_-_Pinacoteca_Ambrosiana.jpg",
    "image_width": 3851,
    "image_height": 5055,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Portrait_of_a_Musician",
    "year_start": 1483,
    "year_end": 1487,
    "circa": true,
    "slug": "portrait-of-a-musician",
    "tier": "famous",
    "held_at": "Pinacoteca Ambrosiana, Milan"
  },
  {
    "title": "Saint Jerome in the Wilderness",
    "date": "c. 1480–1490",
    "medium": "Oil and tempera on walnut panel",
    "dimensions": "103 × 75 cm",
    "current_location": "Vatican Pinacoteca",
    "type": "painting",
    "era": "early",
    "subject": "religious",
    "attribution": "accepted (unfinished)",
    "commons_filename": "Saint_Jerome_Leonardo_-_image_only_(Q972196).jpg",
    "famous": true,
    "id": 14,
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/6/6d/Saint_Jerome_Leonardo_-_image_only_%28Q972196%29.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Saint_Jerome_Leonardo_-_image_only_%28Q972196%29.jpg/960px-Saint_Jerome_Leonardo_-_image_only_%28Q972196%29.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Saint_Jerome_Leonardo_-_image_only_(Q972196).jpg",
    "image_width": 2492,
    "image_height": 3457,
    "mime": "image/jpeg",
    "provenance_url": "https://en.wikipedia.org/wiki/Saint_Jerome_in_the_Wilderness_(Leonardo)",
    "year_start": 1480,
    "year_end": 1490,
    "circa": true,
    "slug": "saint-jerome-in-the-wilderness",
    "tier": "famous",
    "held_at": "Vatican Pinacoteca"
  },
  {
    "title": "Adoration of the Magi",
    "date": "c. 1481–1482",
    "medium": "Oil on panel",
    "dimensions": "246 × 243 cm",
    "current_location": "Uffizi, Florence",
    "type": "painting",
    "era": "early",
    "subject": "religious",
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    "id": 97,
    "title": "1856,0621.1, The Virgin and Christ Child with a cat",
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    "type": "drawing",
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    "era": "early",
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    "id": 98,
    "title": "Leonardo da Vinci, Study for the Madonna of the Cat (recto)",
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    "subject": "religious",
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    "id": 99,
    "title": "Leonardo da Vinci, Study for the Madonna of the Cat (verso) (cropped)",
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    "type": "drawing",
    "subject": "religious",
    "era": "early",
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    "id": 100,
    "title": "Leonardo da Vinci, Study for the Madonna of the Cat (verso)",
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    "type": "drawing",
    "subject": "religious",
    "era": "early",
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    "id": 101,
    "title": "Madonna with child and cat.",
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    "image_height": 591,
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    "id": 102,
    "title": "Da vinci - the head of madonna",
    "date": "",
    "type": "drawing",
    "subject": "study",
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    "attribution": "attributed",
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    "year_start": null,
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    "circa": false,
    "famous": false,
    "harvest_method": "commons_category:Tête de femme presque de profil (INV 2376)",
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    "id": 103,
    "title": "Study of a woman's head",
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    "mime": "image/jpeg",
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    "harvest_method": "commons_category:Tête de femme presque de profil (INV 2376)",
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    "id": 104,
    "title": "Tête de femme presque de profil",
    "date": "",
    "type": "drawing",
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    "attribution": "attributed",
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    "title": "Leonardo da Vinci - Decorazione ornamentale, D.C. 15572 verso",
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    "year_start": 1478,
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    "id": 106,
    "title": "Leonardo da Vinci - Volto di fanciulla, D.C. 15572 recto",
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    "title": "Head of a girl",
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    "id": 108,
    "title": "study Madonna of the rocks",
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    "era": "early",
    "attribution": "attributed",
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    "image_height": 3138,
    "mime": "image/jpeg",
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    "title": "Cesare-Borgia-sketches-by-Leonardo-da-Vinci",
    "date": "between summer 1502 and January 1503",
    "type": "drawing",
    "subject": "study",
    "era": "late",
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    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/d/df/Cesare-Borgia-sketches-by-Leonardo-da-Vinci.jpg",
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    "title": "Study of horses",
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    "type": "drawing",
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    "id": 112,
    "title": "Leonardo da Vinci - RCIN 912339, A cavalcade c.1503-4",
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    "type": "drawing",
    "subject": "study",
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    "title": "Leonardo da Vinci LUCAN Barbatelli 2 - 3",
    "date": "circa 1505",
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    "id": 115,
    "title": "The Battle of Anghiari, Study of battles on horseback and on foot",
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        "label": "Rubens copy (c. 1603)",
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        "note": "Rubens's drawing of Leonardo's lost central group (the \"Fight for the Standard\"). The original wall painting in the Palazzo Vecchio was abandoned by Leonardo in 1506 and painted over by Vasari in 1563; this copy preserves the composition.",
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    "tier": "well_known"
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    "id": 116,
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    "id": 117,
    "title": "Study for Madonna with the Yarnwinder (?)",
    "date": "circa 1501",
    "type": "drawing",
    "subject": "study",
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    "id": 118,
    "title": "Study of battles on horseback",
    "date": "between 1503 and 1504",
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    "title": "Study of Horsemen in Combatlabel QS:Len,\"Study of Horsemen in Combat\"label QS:Lde,\"Reitergruppe in der Schlacht von Anghiari\"",
    "date": "between 1503 and 1504",
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    "title": "Leda and the Swan",
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    "date": "",
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    "date": "",
    "type": "drawing",
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    "title": "Leonardo da Vinci - RCIN 970129, A study for Leda c. 1505-6",
    "date": "",
    "type": "drawing",
    "subject": "study",
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    "date": "",
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    "id": 128,
    "title": "Détail sur l'Étude pour la tête de sainte Anne",
    "date": "",
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    "image_url": "https://upload.wikimedia.org/wikipedia/commons/4/49/Anonymous_north_Italian%2C_16th_century_-_RCIN_990054%2C_The_head_of_a_man_c._1550.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Anonymous_north_Italian%2C_16th_century_-_RCIN_990054%2C_The_head_of_a_man_c._1550.jpg/960px-Anonymous_north_Italian%2C_16th_century_-_RCIN_990054%2C_The_head_of_a_man_c._1550.jpg",
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    "circa": true,
    "famous": false,
    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
    "slug": "anonymous-north-italian-16th-century-rcin-990054-the-head-of",
    "held_at": "Royal Collection, Windsor"
  },
  {
    "id": 480,
    "title": "Attributed to Cesare da Sesto - RCIN 990056, A study of the Assumption of the Virgin c. 1510-15",
    "date": "c. 1510-15",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Cesare_da_Sesto_-_RCIN_990056,_A_study_of_the_Assumption_of_the_Virgin_c._1510-15.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/5/5a/Attributed_to_Cesare_da_Sesto_-_RCIN_990056%2C_A_study_of_the_Assumption_of_the_Virgin_c._1510-15.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Attributed_to_Cesare_da_Sesto_-_RCIN_990056%2C_A_study_of_the_Assumption_of_the_Virgin_c._1510-15.jpg/960px-Attributed_to_Cesare_da_Sesto_-_RCIN_990056%2C_A_study_of_the_Assumption_of_the_Virgin_c._1510-15.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Attributed_to_Cesare_da_Sesto_-_RCIN_990056,_A_study_of_the_Assumption_of_the_Virgin_c._1510-15.jpg",
    "provenance_url": "https://commons.wikimedia.org/wiki/File:Attributed_to_Cesare_da_Sesto_-_RCIN_990056,_A_study_of_the_Assumption_of_the_Virgin_c._1510-15.jpg",
    "image_width": 1135,
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    "mime": "image/jpeg",
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    "year_end": 1515,
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    "slug": "attributed-to-cesare-da-sesto-rcin-990056-a-study-of-the-ass",
    "held_at": "Royal Collection, Windsor"
  },
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    "id": 481,
    "title": "Attributed to Francesco Melzi - RCIN 912299, Horses' fore-legs c.1510-20",
    "date": "c.1510-20",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912299,_Horses'_fore-legs_c.1510-20.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/2/28/Attributed_to_Francesco_Melzi_-_RCIN_912299%2C_Horses%27_fore-legs_c.1510-20.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/2/28/Attributed_to_Francesco_Melzi_-_RCIN_912299%2C_Horses%27_fore-legs_c.1510-20.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Attributed_to_Francesco_Melzi_-_RCIN_912299,_Horses%27_fore-legs_c.1510-20.jpg",
    "provenance_url": "https://commons.wikimedia.org/wiki/File:Attributed_to_Francesco_Melzi_-_RCIN_912299,_Horses%27_fore-legs_c.1510-20.jpg",
    "image_width": 676,
    "image_height": 768,
    "mime": "image/jpeg",
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    "year_end": 1520,
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    "slug": "attributed-to-francesco-melzi-rcin-912299-horses-fore-legs-c",
    "held_at": "Royal Collection, Windsor"
  },
  {
    "id": 482,
    "title": "Attributed to Francesco Melzi - RCIN 912299, v, Horses' fore-legs c.1510-20",
    "date": "c.1510-20",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912299,_v,_Horses'_fore-legs_c.1510-20.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/1/1b/Attributed_to_Francesco_Melzi_-_RCIN_912299%2C_v%2C_Horses%27_fore-legs_c.1510-20.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/1/1b/Attributed_to_Francesco_Melzi_-_RCIN_912299%2C_v%2C_Horses%27_fore-legs_c.1510-20.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Attributed_to_Francesco_Melzi_-_RCIN_912299,_v,_Horses%27_fore-legs_c.1510-20.jpg",
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    "image_width": 674,
    "image_height": 768,
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
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    "held_at": "Royal Collection, Windsor"
  },
  {
    "id": 483,
    "title": "Horses' fore-legslabel QS:Len,\"Horses' fore-legs\"label QS:Len-gb,\"Horses' fore-legs\"",
    "date": "between circa 1510 and circa 1520",
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    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912302,_Horses'_fore-legs_c.1510-20.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/1/1c/Attributed_to_Francesco_Melzi_-_RCIN_912302%2C_Horses%27_fore-legs_c.1510-20.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/1/1c/Attributed_to_Francesco_Melzi_-_RCIN_912302%2C_Horses%27_fore-legs_c.1510-20.jpg",
    "commons_page": "https://commons.wikimedia.org/wiki/File:Attributed_to_Francesco_Melzi_-_RCIN_912302,_Horses%27_fore-legs_c.1510-20.jpg",
    "provenance_url": "https://commons.wikimedia.org/wiki/File:Attributed_to_Francesco_Melzi_-_RCIN_912302,_Horses%27_fore-legs_c.1510-20.jpg",
    "image_width": 692,
    "image_height": 768,
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
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    "held_at": "Royal Collection, Windsor"
  },
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    "id": 484,
    "title": "Attributed to Francesco Melzi - RCIN 912333, Studies of the hind-quarters of horses c.1517-18",
    "date": "c.1517-18",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912333,_Studies_of_the_hind-quarters_of_horses_c.1517-18.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/d/db/Attributed_to_Francesco_Melzi_-_RCIN_912333%2C_Studies_of_the_hind-quarters_of_horses_c.1517-18.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/d/db/Attributed_to_Francesco_Melzi_-_RCIN_912333%2C_Studies_of_the_hind-quarters_of_horses_c.1517-18.jpg",
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    "image_width": 557,
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    "mime": "image/jpeg",
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
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    "held_at": "Royal Collection, Windsor"
  },
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    "id": 485,
    "title": "Attributed to Francesco Melzi - RCIN 912361, A dog's head and chest, and hind-leg c.1510-20",
    "date": "c.1510-20",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912361,_A_dog's_head_and_chest,_and_hind-leg_c.1510-20.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/6/60/Attributed_to_Francesco_Melzi_-_RCIN_912361%2C_A_dog%27s_head_and_chest%2C_and_hind-leg_c.1510-20.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Attributed_to_Francesco_Melzi_-_RCIN_912361%2C_A_dog%27s_head_and_chest%2C_and_hind-leg_c.1510-20.jpg/960px-Attributed_to_Francesco_Melzi_-_RCIN_912361%2C_A_dog%27s_head_and_chest%2C_and_hind-leg_c.1510-20.jpg",
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    "famous": false,
    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
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    "held_at": "Royal Collection, Windsor"
  },
  {
    "id": 486,
    "title": "Attributed to Francesco Melzi - RCIN 912371, The head of a devil c.1510-20",
    "date": "1970-01-01c.1510-20",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912371,_The_head_of_a_devil_c.1510-20.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/5/55/Attributed_to_Francesco_Melzi_-_RCIN_912371%2C_The_head_of_a_devil_c.1510-20.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/5/55/Attributed_to_Francesco_Melzi_-_RCIN_912371%2C_The_head_of_a_devil_c.1510-20.jpg/960px-Attributed_to_Francesco_Melzi_-_RCIN_912371%2C_The_head_of_a_devil_c.1510-20.jpg",
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
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    "held_at": "Royal Collection, Windsor"
  },
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    "id": 487,
    "title": "Attributed to Francesco Melzi - RCIN 912727, The castle of Amboise c.1516-19",
    "date": "c.1516-19",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912727,_The_castle_of_Amboise_c.1516-19.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/b/bd/Attributed_to_Francesco_Melzi_-_RCIN_912727%2C_The_castle_of_Amboise_c.1516-19.jpg",
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    "provenance_url": "https://commons.wikimedia.org/wiki/File:Attributed_to_Francesco_Melzi_-_RCIN_912727,_The_castle_of_Amboise_c.1516-19.jpg",
    "image_width": 2000,
    "image_height": 1142,
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    "year_start": 1516,
    "year_end": 1519,
    "circa": true,
    "famous": false,
    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
    "slug": "attributed-to-francesco-melzi-rcin-912727-the-castle-of-ambo",
    "held_at": "Royal Collection, Windsor"
  },
  {
    "id": 488,
    "title": "Attributed to Francesco Melzi - RCIN 912727, v, The castle of Amboise c.1516-19",
    "date": "c.1516-19",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Francesco_Melzi_-_RCIN_912727,_v,_The_castle_of_Amboise_c.1516-19.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/2/2e/Attributed_to_Francesco_Melzi_-_RCIN_912727%2C_v%2C_The_castle_of_Amboise_c.1516-19.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Attributed_to_Francesco_Melzi_-_RCIN_912727%2C_v%2C_The_castle_of_Amboise_c.1516-19.jpg/960px-Attributed_to_Francesco_Melzi_-_RCIN_912727%2C_v%2C_The_castle_of_Amboise_c.1516-19.jpg",
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
    "slug": "attributed-to-francesco-melzi-rcin-912727-v-the-castle-of-am",
    "held_at": "Royal Collection, Windsor"
  },
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    "id": 489,
    "title": "Attributed to Giampietrino - RCIN 912809, The head of a young woman c.1500-20",
    "date": "c.1500-20",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Attributed_to_Giampietrino_-_RCIN_912809,_The_head_of_a_young_woman_c.1500-20.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/5/54/Attributed_to_Giampietrino_-_RCIN_912809%2C_The_head_of_a_young_woman_c.1500-20.jpg",
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    "provenance_url": "https://commons.wikimedia.org/wiki/File:Attributed_to_Giampietrino_-_RCIN_912809,_The_head_of_a_young_woman_c.1500-20.jpg",
    "image_width": 1287,
    "image_height": 1342,
    "mime": "image/jpeg",
    "year_start": 1500,
    "year_end": 1520,
    "circa": true,
    "famous": false,
    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
    "slug": "attributed-to-giampietrino-rcin-912809-the-head-of-a-young-w",
    "held_at": "Royal Collection, Windsor"
  },
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    "id": 490,
    "title": "Cesare da Sesto - RCIN 912544, The left hand of St Bartholomew in the Last Supper c.1515",
    "date": "c.1515",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Cesare_da_Sesto_-_RCIN_912544,_The_left_hand_of_St_Bartholomew_in_the_Last_Supper_c.1515.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/c/cb/Cesare_da_Sesto_-_RCIN_912544%2C_The_left_hand_of_St_Bartholomew_in_the_Last_Supper_c.1515.jpg",
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    "image_height": 1205,
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    "circa": true,
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
    "slug": "cesare-da-sesto-rcin-912544-the-left-hand-of-st-bartholomew",
    "held_at": "Royal Collection, Windsor"
  },
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    "id": 491,
    "title": "Cesare da Sesto - RCIN 912544, v, The left hand of St Bartholomew in the Last Supper c.1515",
    "date": "c.1515",
    "type": "drawing",
    "subject": "study",
    "era": "late",
    "attribution": "accepted",
    "commons_filename": "Cesare_da_Sesto_-_RCIN_912544,_v,_The_left_hand_of_St_Bartholomew_in_the_Last_Supper_c.1515.jpg",
    "image_url": "https://upload.wikimedia.org/wikipedia/commons/1/1f/Cesare_da_Sesto_-_RCIN_912544%2C_v%2C_The_left_hand_of_St_Bartholomew_in_the_Last_Supper_c.1515.jpg",
    "thumb_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Cesare_da_Sesto_-_RCIN_912544%2C_v%2C_The_left_hand_of_St_Bartholomew_in_the_Last_Supper_c.1515.jpg/960px-Cesare_da_Sesto_-_RCIN_912544%2C_v%2C_The_left_hand_of_St_Bartholomew_in_the_Last_Supper_c.1515.jpg",
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    "harvest_method": "commons_category:Drawings by Leonardo da Vinci in the Royal Collection of the United Kingdom",
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    "held_at": "Royal Collection, Windsor"
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  {
    "id": 492,
    "title": "Cesare da Sesto - RCIN 912545, The left hand of St Thomas in the Last Supper c.1515",
    "date": "c.1515",
    "type": "drawing",
    "subject": "study",
    "era": "late",
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    "subject": "study",
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