Boston, the capital of the U.S. state of Massachusetts and the largest city in New England, is home to 251 completed high-rises, 32 of which stand taller than 400 feet (122 m). The majority of the city's skyscrapers and high-rises are clustered in the Financial District and Back Bay neighborhoods. The tallest structure in Boston is the 60-story 200 Clarendon, better known to locals as the John Hancock Tower, which rises 790 feet (241 m) in the Back Bay district. It is also the tallest building in New England and the 63rd-tallest building in the United States. The second-tallest building in Boston is the Prudential Tower, which rises 52 floors and 749 feet (228 m). At the time of the Prudential Tower's completion in 1964, it stood as the tallest building in North America outside of New York