well as Continuing Studies, Osher Lifelong Learning Institute (OLLI) students, and graduate students. Widener's graduate programs include business, education, engineering, nursing, social work, physical therapy, and clinical psychology. The School of Law, which opened in 1976 on the Delaware Campus, consists of 16 buildings across and is from the Main Campus. It contains the School of Law as well as the Legal Education Institute. Some classes for Continuing Studies students and graduate business students are also held here. The Harrisburg Campus, opening in 1989, contains the Widener University Commonwealth Law School and has graduate programs in nursing and social work held there. In July 2015, Widener School of Law, which used to be one school sitting on the Delaware and Harrisburg campuses, split to become Widener University Delaware Law School in Wilmington and Widener University Commonwealth Law School in Harrisburg. Starting in 2004, the Exton Campus was added to Widener's growing institution. It is located in a business park from the Main Campus. It primarily serves Continuing Studies students and contains Widener's Osher Lifelong Learning Institute (OLLI), which provides continuing education programs for retired adults. Academics Widener's academic offerings include over 50 undergraduate majors, 40 minors, and more than 30 graduate programs of study. Widener has an undergraduate student to faculty ratio of 12:1 with 90% of the full-time faculty having doctorates or the highest degree in their field. In addition, 60% of all classes contain less than 20 students. Libraries and museums The Wolfgram Memorial Library contains 242,000 volumes, 175,000 microfilms, 12,000 audio-visual materials and 1,960 serial subscriptions. In 1979, Widener University leased and restored the Deshong Art Museum located on Edgemont Avenue in Chester. The Deshong Art Museum was built in 1914 after the death of the art collector and wealthy industrialist Alfred O. Deshong left his trust and land to the city of Chester. Deshong donated over 300 pieces of art to the museum including carved Japanese ivory figures, Chinese carved hard stone vessels and 19th century American and European paintings. Over the years, the museum fell into disrepair and in July 1984 the trustees that managed the art museum dissolved the trust. The Asian and impressionistic art collection were given to Widener University and are displayed in their permanent collection. The PMC Museum highlights the legacy of the Pennsylvania Military Academy of Cadets with exhibits of sabres, uniforms, scrapbooks, newspapers and yearbooks. Rankings and classifications In