The Adam Clayton Powell Jr. State Office Building, originally the Harlem State Office Building, is a nineteen-story, high-rise office building located at 163 West 125th Street at the corner of Adam Clayton Powell Jr. Boulevard in the Harlem neighborhood of Manhattan, New York City. It is named after Adam Clayton Powell Jr, the first African-American elected to Congress from New York. It was designed by the African-American architecture firm of Ifill Johnson Hanchard in the shape of an African mask in the Brutalist style. It is the tallest building in Harlem, overtaking the nearby Hotel Theresa.