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:
Conjuntos de dados
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Data regarding artworks, artists, museums and other visual art subjects. Tab-delimited data dump available. Licence is CC-BY, although the attribution page says "Many Freebase...