The zoo is technically owned by the city of Oakland; however, it's operated by the non-profit East Bay Zoological Society. Parrott maintains the monument's presence was neither unconstitutional nor illegal--instead, it was removed to ensure that no one would feel uncomfortable visiting the zoo.
MORE: http://www.huffingtonpost.com/2012/07/26/oakland-zoo-ten-commandments-removed_n_1707718.html
See also...
Lions And Tigers And -- The Ten Commandments?!: Oakland Zoo Removes Decalogue Days Before Planned Protest
http://www.au.org/blogs/wall-of-separation/lions-and-tigers-and-the-ten-commandments-oakland-zoo-removes-decalogue
Biblical monument removed from East bay zoo
http://www.mercurynews.com/breaking-news/ci_21160015/biblical-monument-removed-from-east-bay-zoo
