Butler Library

Butler Library is located on the Morningside Heights campus of Columbia University at 535 West 114th Street, in Manhattan, New York City. It is the university's largest single library with over 2 million volumes, as well as one of the largest buildings on the campus. It houses the Columbia University Libraries collections in the humanities, history, social sciences, literature, philosophy, and religion, and the Columbia Rare Book and Manuscript Library.

The Neoclassical style building was built in 1931–1934 to a design by James Gamble Rogers. Butler Library remains at least partially open 24 hours a day during the academic year.: 1–2