In 1905 Andrew Carnegie donated $125,000 to build what is now known as Clapp Library, on the condition that the College match the amount for an endowment. The money was raised by 1907 and construction began June 5, 1909. In 1915 Carnegie gave another $95,446 towards an addition. This renovation added a recreational reading room, offices, archives, a reserve reading room, added space for rare books and additional stacks. The building underwent renovations from 1956–1959, that doubled its size. From 1973 to 1975 a major addition was added to the right-hand side of the building. In 1974 the building was renamed for Margaret Antoinette Clapp, a Pulitzer Prize-winning author and member of the 1930 class who served as the 8th college president from 1949–1966.