For data regarding artworks, collections, galleries or museums, state funding or involvement in the arts, art history, and aesthetics.
There's been a lot of activity on the art open data front recently:
Here are some examples of the kinds of things you can do with art open data:
4 datasett funnet.
About The key goals of The Commons on Flickr are to firstly show you hidden treasures in the world's public photography archives, and secondly to show how your input and knowledge can...
A database of over 70,000 objects in The PowerHouse Museum in Australia.
A screen-scraped RDF/SPARQL database of artworks in various UK government collections. See here for details of how the data was assembled:...
A REST API to search the V&A's collection. Sadly restricted to academic and noncommercial use. Search for items by keyword, artist/maker, collection, year, material/technique,...