Bridgeman Art LibraryThe Bridgeman Archive contains about 67,000 images from museum, art gallery and artist collections throughout the world, all copyright cleared for educational use. Includes design, maps, architecture, furniture, glass, ceramics, anthropological artifacts and more. (Access through Credo Reference).
Guide with tips to improve your image searches:
https://www.bridgemaneducation.com/documents/how-to-guide.pdf