The Boston Public Library (BPL) is a municipal public library system in Boston, Massachusetts, founded in 1848. The Boston Public Library is also Massachusetts' Library for the Commonwealth, meaning all adult residents of the state are entitled to borrowing and research privileges, and the library receives state funding. The Boston Public Library contains approximately 24 million items, making it the third-largest public library in the United States behind the federal Library of Congress and New York Public Library, which is also privately endowed. The Boston Central Library in Copley Square was designated as a Boston Landmark by the Boston Landmarks Commission in 2000.