British Printed Images to 1700 is a fully searchable (if somewhat buggy at this early stage of release) online library of over 10,000 printed images from early modern Britain. As a taster, here is the naughty Cully Flaug'd [NSFW] of the title.
posted by tellurian on Jul 12, 2009 - 17 comments

30,000 photos in the online archive of the Tibetan and Himalayan Digital Library, a non-profit initiative from the University of Virginia, offering a large database of texts, audio, video, images, maps, bibliographies, journals, links and other resources for Himalayan studies.
posted by funambulist on Oct 7, 2005 - 7 comments

Collect Britain 'presents 90,000 images and sounds from the British Library, chosen to evoke places in the UK and beyond.' Dialects, gardens, sketches, stamps, and all kinds of stuff.
posted by plep on Mar 4, 2005 - 4 comments

State Library of Tasmania, Heritage Collection Image Library.
posted by hama7 on Jan 15, 2004 - 3 comments