The streetart project
As “the world’s largest art collection” the streetart project, that was created in co-operation with Google Streetview, is described on its website. Does work similar, too, but the focus is – as the name may tell already – on streetart.
You can either search for the city or place you’re looking for directly, or zoom in and out of the virtual map of streetart. There is a filter for artists as well, but not many have been listed yet.
A nice tool for all fans of streetart – even individual city trips can be planned by looking for all those alternative sights…