The Metropolitan State Hospital was an American public hospital for the mentally ill, on grounds that extended across parts of Waltham, Lexington, and Belmont, Massachusetts. Founded in 1927, it was at one time the largest and most modern facility of its type in Massachusetts. It was closed in January 1992 as a result of the state's cost-cutting policy of closing its mental hospitals and moving patients into private and community-based settings. The main complex of buildings has subsequently been redeveloped into apartments. The hospital campus was listed on the National Register of Historic Places 1994. The property also housed the Gaebler Children's Center for mentally ill youth.HistoryThe Metropolitan State Hospital's founding originated in legislation passed by the state in 1900, mandating that the state take over care for the mentally ill, which had in some cases only been handled at the local level. Site selection for a facility in the Greater Boston area, where the demand for additional space was the greatest, took until 1926. Ground was broken on the hospital buildings in 1926, and the facility was formally dedicated in 1928.The hospital's design was reflective of the third stage of development of facilities for the mentally ill, after the Kirkbride Plan and the cottage/colony system. It also reflected the advent of roads rather than railroads as major transport arteries, as it was not located near any railroad lines. Its buildings were designed in the Colonial Revival style by Gordon Robb, with landscaping, based on principles laid down by the Olmsted Brothers, by R. Hayward Loring. At its peak, the facility had a patient population of nearly 2,000.