The trend for museums and galleries to make high-resolution images of their collections available for online browsing took another major step forward recently, with an announcement from New York's Metropolitan Museum of Art. The institution has made available almost 400,000 images, which covers almost all of its collection of art and artefacts.
Under a program called the Open Access For Scholarly Content (OASC), you can browse the entire collection via your web browser, and download images for any non-commercial purpose.
Just head to http://www.metmuseum.org/collection to get started.
My thanks to regular contributor Lex Davidson for telling me about this great new resource.