Here are some photos of iconic Butler Library at Columbia University. It houses 2 million volumes which comprise the University's collections in the humanities, with particular strengths in history (including government documents and social science materials published before 1974), literature, philosophy and religion, as well as one of the country's most extensive collections of materials pertinent to the study of Greco-Roman antiquity. The stacks consist of 12 floors of books and the entrance is at the third floor Circulation Desk. It is the largest of the more than twenty libraries and collections comprising Columbia University Libraries. The building was financed by Standard Oil executive and philanthropist Edward S. Harkness and designed by James Gamble Rogers, opening in 1934 as "South Hall." It was renamed in 1946 in honor of Nicholas Murray Butler, president of the University from 1902-1945.