* The Metropolitan Museum of Art: The Metropolitan Museum of Art has a large collection of medieval art, including paintings, sculptures, and tapestries. Many of these images are freely available online.
* The Louvre: The Louvre has a significant collection of medieval art, including the Mona Lisa and Venus de Milo. Many of these images are freely available online.
* The Rijksmuseum: The Rijksmuseum has a collection of medieval art from the Netherlands, including paintings, sculptures, and stained glass. Many of these images are freely available online.
* The Prado Museum: The Prado Museum has a vast collection of medieval art from Spain, including paintings, sculptures, and tapestries. Many of these images are freely available online.
* The Bayerische Staatsbibliothek: The Bayerische Staatsbibliothek in Munich, Germany, has an extensive collection of medieval manuscripts, including the famous Codex Manesse. Many of these manuscripts have been digitized and are available online.
* The Bibliothèque nationale de France: The Bibliothèque nationale de France in Paris has a vast collection of medieval manuscripts and other resources, including images. Many of these images are freely available online.