The Mortvedt Library offers over 260,000 volumes of books as well as over 23,000 full-text journals. The oldest book in the PLU collection is a psalter by Johann Bugenhagen published in 1524. Built in 1937, Xavier Hall served as the library until the Mortvedt Library was built in 1967. Since then the Division of Social Sciences has been housed in Xavier. In 2000 Xavier underwent a $5 million renovation project that saw the addition of the Philip Nordquist Lecture Hall. The University Center is also located on upper campus. This building houses the all-campus cafeteria, called the University Commons, and the Old Main Market. In addition it houses the offices of Campus Ministry, Student Involvement and Leadership, Residential Life, the Diversity Center, the Scandinavian Center, Student Media, Residence Hall Association, the Associated Students of PLU (ASPLU), Dining Services, Conferences and Events, and the Chris Knutzen Lecture Hall.