City Lights is an independent bookstore-publisher combination in San Francisco, California that specializes in world literature, the arts, and progressive politics. It also houses the nonprofit City Lights Foundation, which publishes selected titles related to San Francisco culture. It was founded in 1953 by poet Lawrence Ferlinghetti and Peter D. Martin (who left two years later). Both the store and the publishers became widely known following the obscenity trial of Ferlinghetti for publishing Allen Ginsberg's influential collection Howl and Other Poems (City Lights, 1956). Nancy Peters started working there in 1971 and retired as executive director in 2007. In 2001, City Lights was made an official historic landmark.