THE INDEX OF MEDIEVAL ART

https://ima.princeton.edu/

Founded in 1917, Yale University's Index of Medieval Art is dedicated to "images and information relating to the iconographic traditions of the medieval world." The index, which was originally called the Index of Christian Art, contains 200,000 items dating from the early years of Christianity through the 1500s. Visitors can explore this rich database of images in two ways. In Digital Image Collections, available via the resources tab, images are organized into collections. Included collections are the Jane Hayward Database of Medieval Art, the John Plummer Database of Medieval Manuscripts, and the Gertrude and Robert Metcalf Collection of Images of Stained Glass, to name just a few. Alternatively, visitors may browse or search the database in full via the explore the database tab. Meanwhile, the site's homepage contains a number of insightful short essays that provide context for items in the collections. For example, in one recent blog post, Professor Pamela Patton examines how the hagiography of Saint George and Saint Drogo evolved over time. The Index of Medieval Art is a fabulous resource for students and scholars interested in art and religious studies. 

via https://scout.wisc.edu/archives/r49450/the_index_of_medieval_art