 The Matisse window was his final piece prior to his death in 1954 and was commissioned by Nelson A. Rockefeller in memory of his mother, Abby Aldrich Rockefeller, one of the founders of the Museum of Modern Art.Emergency services stem from a variety of sources, with policing services provided by the Town of Mount Pleasant Police Department, fire protection services provided from the all-volunteer Pocantico Hills Fire Department, and emergency medical services from a combination of the Sleepy Hollow Volunteer Ambulance Corps (SHVAC), Pleasantville Volunteer Ambulance Corps (PVAC), and Westchester EMS.The first volunteer fire department, Liberty Hook and Ladder Company, was organized in 1904.