The western third of Harvard Yard is known as the Old Yard, and around it cluster most of the freshman dormitories. Among these is Massachusetts Hall, which, having been constructed in 1720, is the oldest still-standing building on Harvard's campus and the second-oldest academic building in the United States. The lower floors of Massachusetts Hall house the offices of the President of Harvard University.
The center of Harvard Yard is a wide grassy area known as Tercentenary Theater, framed by the monumental Widener Library and Memorial Church. Harvard's annual commencement exercises, as well as occasional special convocations, take place in Tercentenary Theater.