The Commons on Flickr is the most amazing resource, but not only does it contain tens of thousands of images from large institutions across the world, shared for all to see (and use), it is a whole community where information is offered, gathered and documented. You can see what’s happening and keep up with the latest news and discoveries in the Flickr Commons group. There’s also a dedicated and fascinating blog called Indicommons.
To give you a flavour, here’s a slideshow of some example images from the UK’s National Maritime Museum, but be sure to check out more via the main Commons site – www.flickr.com/commons. And finally, I’ve just put together a (very experimental) interactive timeline of pre-1900 Commons images – about 11,000 in total!
Error fetching Flickr photos: A feed could not be found at http://api.flickr.com/services/rest/?method=flickr.photos.search&lang=en-us&format=feed-rss_200&api_key=8384e88fcfc8ac5cf7e63b68702751a3&user_id=11334970@N05