Digitised photography collections that you can download
See here for 6000+ early images digitised and downloadable from the Cleveland Art Collection
But don't forget these as well ...
The American Museum of Natural HistoryThe Guggenheim Museum (art books)The Met MuseumEuropeana CollectionsNASA
Thank you Don. These are amazing resources of which I had absolutely no idea. Very appreciative.
Excellent! Thank you.