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 dataset hittades.
A project of the University of York and the Tate to create linked data for a dataset of "The London Art World 1660-1735". Currently in progress, with the ODbL as forerunner for the...
"NI 9 Use of public libraries NI 10 Visits to museums and galleries NI 11 Engagement in the arts"
Various RDF datasets from the National Gallery. Some appear to be under an original-BSD-style licence, which I believe amounts to an attribution licence.
A screen-scraped RDF/SPARQL database of artworks in various UK government collections. See here for details of how the data was assembled:...