The University's rare book and manuscript collections are held in the Howard Gotlieb Archival Research Center, formerly called the Twentieth Century Archives. The Research Center is housed on the fifth floor of the Mugar Library (accessible by the South elevator) and is open to the public for research and viewing. The Center's reception area also includes a large display area where examples of its holdings are on display. There is also a reading room for studying its materials. Research scholars must make appointments at least two days in advance to use papers from the collections.