Yale University is a private research university that belongs to the famed Ivy League, an association of America's most prominent higher education institutions. The central campus of Yale University covers 260 acres and includes buildings dating back to the mid-eighteenth century. There are 14 schools at Yale, including the original undergraduate college, the Yale Graduate School of Arts and Sciences, and 12 professional schools. Undergraduates are required to take a liberal arts curriculum, which allows them to think and learn across disciplines before deciding on a major.