U.S.A. Contemporary 10.5 x 10.5 inch gypsum tile depicting the topography of the city limits of San Francisco. What It is Is a 4th dimensional Abstract Expressionist sculpted painting that reads like a space map. If you try finding the space key, You'll have to look Here in the City Limits of San Francisco, the City we love. -Jack Hirschman, San Francisco Poet Laureate