McLean Hospital () (formerly known as Somerville Asylum and Charlestown Asylum) is a psychiatric hospital in Belmont, Massachusetts. It is noted for its clinical staff expertise and neuroscience research and is also known for the large number of famous people who have been treated there. McLean maintains the world's largest neuroscientific and psychiatric research program in a private hospital. It is the largest psychiatric facility of Harvard Medical School, an affiliate of Massachusetts General Hospital, and part of Mass General Brigham, which also includes Brigham and Women's Hospital. History McLean was founded in 1811 in a section of Charlestown, Massachusetts that is now a part of Somerville, Massachusetts. Originally named Asylum for the Insane, it was the first institution organized by a group of prominent Bostonians who were concerned about homeless mentally ill persons "abounding on the streets and by-ways in and about Boston". The effort was organized by Rev. John Bartlett, chaplain of the Boston Almshouse. The hospital was built around a Charles Bulfinch mansion, which became the hospital's administrative building; most of the other hospital buildings were completed by 1818. The institution was later given the name The McLean Asylum for the Insane in honor of one of its earliest benefactors, John McLean, who granted enough money to build several such hospitals. A portrait of McLean now hangs in the present Administration Building, along with other paintings that were once displayed in the original hospital. In 1892, the facility was renamed McLean Hospital in recognition of broader views on the treatment of mental illness. In 1895 the campus moved to Waverley Oaks Hill in Belmont, Massachusetts. Joseph Curtis (civil engineer) and Frederick Law Olmsted (the renowned landscape architect who also conceptualized the Emerald Necklace public spaces of Boston, New York's Central Park, and Hartford's Institute of Living) were consulted on the selection of the hospital site. The move was necessitated by changes in Charlestown, including new rail lines and other distracting development. Olmsted himself was eventually treated at McLean, but there is no evidence that he was responsible for the design of the grounds. Once hospital construction began, Curtis was hired by the hospital, and supervised the landscape work for many years. In the 1990s, facing falling revenue in a changing health care industry, the hospital drafted a plan to sell a portion of its grounds for development in the Town of Belmont. The proposed sale of the