The 47-story Singer Building , completed in 1908 , was also designed by Flagg , who designed two landmark residences for Bourne . Constructed during Bourne 's tenure , the Singer Building ( demolished in 1968 ) was then the tallest building in the world and was the tallest building to be intentionally demolished until the Twin Towers of the World Trade Center were destroyed in the September 11 attacks
September 11 attacks
September 11 attacks
Singer Corporation