The University of Pittsburgh (Pitt) is a state-related research university in Pittsburgh, Pennsylvania, United States. The university is composed of seventeen undergraduate and graduate schools and colleges at its urban Pittsburgh campus, home to the university's central administration and over 31,000 undergraduate and graduate students. The 132-acre Pittsburgh campus includes various historic buildings that are part of the Schenley Farms Historic District, most notably its 42-story Gothic revival centerpiece, the Cathedral of Learning. Pitt is a member of the Association of American Universities and is classified among "R1: Doctoral Universities – Very high research activity". Pitt traces its roots to the Pittsburgh Academy founded by Hugh Henry Brackenridge in 1787.