Artstor
Artstor on JSTOR (Harvard Login) searches more than one million digital images in the arts, architecture, humanities, and sciences from museums, libraries, and archives, including Harvard.
Hint: Use buddhis* (with the asterisk) to search both Buddhism and Buddhist.
Hint: Add a country or regional name to your search.
Hint: See especially the Rob Linrothe Collection of Tibetan and Buddhist Art (Harvard Login) and the Carl Strom and Jennifer Strom Collection of Korean Buddhist Monasteries Art (Harvard Login)
At Harvard
Search HOLLIS for digital images of items in Harvard libraries.
Browse the Hedda Morrison Photographs of China.
Search the Harvard Art Museum's illustrated online database.
Images in print can be found by looking through reference books. For example: The Life of the Buddha (Print Only) includes reproductions of the art of two Burmese manuscripts in the British Library.
Also see Finding Public Domain & Creative Commons Images, a Harvard Law School Library research guide.