The Carnegie Classification of Institutions of Higher Education ranks Portland State as a university with "higher research activity."[1] The 1.4 million-volume, six-floor Branford Price Millar Library is located in the center of campus, opposite Fariborz Maseeh Hall on Park Avenue, and has several computer labs, technology and faculty reading rooms, and video viewing rooms. Built in 1966 as a rectangular structure, the library's convex wall of glass facing the campus' park blocks was added in 1989 to surround and preserve a large copper beech tree that was planted in 1890.