Although Lenfest Hall's major role is to function as an academic library, it offers all the technological advantages available in a modern learning center and serves as home to the History Department and classrooms, the Technology Department, and the School Archives. The building's six- level interior emphasizes light and open space through a series of graduated half flights.
Large windows provide ample visual access to the beauty of the campus.
The exterior of the building not only harmonizes with the hillside on which it sits, but provides an architectural counterpoint to the Chapel. Perhaps the most obvious juxtapositioning of the traditional and the innovative, the ground floor houses the school's Archives and Technology Department. From the ground floor the integration of the classroom and the library begins. The north and south ends of the building serve as classroom space for the History Department. In addition to housing a significant portion of the print collection, including periodicals, literature, fine arts and fiction, the ground floor stack area has a comfortable atrium seating area and an online catalog station.