A more recent building of note is Franklin Towers, a 16-story residential tower completed in 1969. At 175 feet (53 meters), it is Portland's (as well as Maine's) tallest building. It is next to the Cathedral of the Immaculate Conception on the city skyline. During the building boom of the 1980s, several new buildings rose on the peninsula, including the 1983 Charles Shipman Payson Building by Henry N. Cobb of Pei, Cobb, Freed & Partners at the Portland Museum of Art complex (a component of which is the 1801 McLellan-Sweat Mansion), and the Back Bay Tower, a 15-story residential building completed in 1990.