The University of Michigan, often simply referred to as Michigan, is a public research university in Ann Arbor, Michigan. The University of Michigan is the state's oldest university, founded in 1817 in Detroit, Michigan as the Catholepistemiad, or University of Michigania, 20 years before the Michigan Territory became a state. It moved to Ann Arbor in 1837 onto 40 acres (16 ha) of what is now known as Central Campus. Since its establishment in Ann Arbor, the university campus has expanded to include more than 584 major buildings with a combined area of more than 34 million gross square feet spread out over a Central Campus and North Campus, two regional campuses in Flint and Dearborn, and a Center in Detroit. The University was a founding member of the Association of American Universities.