The Torre Argentina Cat Sanctuary is located amidst ruins in Rome, Italy. Volunteers take care of stray cats, including spaying and neutering them. The sanctuary is funded by supporters and tourists from around the world, and having visited it myself I can say that they do great work there and that the cats are what make these ruins particularly notable and interesting. The Italian Culture Ministry has suddenly decided that the cats are a threat to the ruins, despite the fact that the sanctuary has existed for years. They are now trying to evict the sanctuary, despite the fact that they have no alternative location.

More info: http://www.romancats.com/index_eng.php
http://www.nytimes.com/2012/11/08/world/europe/rome-drawn-into-tiff-between-preservationists-and-cat-shelter.html?pagewanted=1&hp