 In 2012, many of the Science Hill libraries were re-consolidated at Kline Science Library as the Center for Science and Social Science Information.The library's largest building, Sterling Memorial Library, contains about four million volumes in the humanities, social sciences, area studies, as well as several special collections projects and the department of Manuscripts and Archives.The Irving S. Gilmore Music Library resides within Sterling Library, and the building is connected via tunnel to the underground Bass Library, a facility for frequently-used materials.