No matter where you search--Google Images, Flickr, TinEye, OtisDID, BePress, etc.--ask yourself these questions:
Credible (with a vested interest): Museums, galleries, artists’ websites, Artsy
Mixed bag: Wikipedia, artist appreciation sites, news outlets
Be wary: Stock photo agencies, Pinterest, Amazon, blogs
The Art of Reproduction recreates famous images by splicing together images found on online. You can see differences in:
TinEye.com is a reverse image search that allows you to sort and filter results in a variety of ways. It is especially good at matching stock images.
It also has a comparison tool to show you how different or alike the result matches your image.
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