The University of Minnesota Libraries is the library system of the University of Minnesota Twin Cities campus, operating at 13 facilities in and around Minneapolis–Saint Paul. It has over 7 million volumes and 119,000 serial titles that are collected, maintained and made accessible. The system is the 17th largest academic library in North America and the 20th largest library in the United States. While the system's primary mission is to serve faculty, staff and students, because the University is a public institution of higher education its libraries are also open to the public.