Yenching University Library was completed in 1926. With the nationwide restructuring of schools and disciplines in 1952, Peking University Library moved to Yenching University Campus, the Library of the latter school incorporated into the former. As the result of this reshuffling, the site of the former Yenching University Library became the new main library of Peking University. After the main library moved to the new building in 1975, this old building was used as reading area and the main stack for back numbers of periodicals from 1975 to 2000. It has become the University Archives ever since.