Named after the Sisters of St. Francis, Oldenburg’s founder, Mother Theresa Hackelmeier, the library was built in 1970 and designed by prominent Indianapolis architect, Evans Wollen. The library includes space for over 200,000 volumes, numerous study areas, classrooms, and a 200-seat auditorium. The library also houses the Exchange, Marian University's center to promote learning opportunities of all types (internships, applied research, special projects).