One Beacon Street is a modern skyscraper in the Government Center neighborhood of Boston, Massachusetts. Built in 1972 and refurbished in 1991, it is Boston's 14th-tallest building, standing 505 feet (154 m) tall, and housing 37 floors. Its position near the top of Beacon Hill gives the building a commanding presence, though it is located away from many other Boston skyscrapers.
The tower houses a radio mast on the roof, for WMFP-TV, that is painted red and white. With its radio mast included, One Beacon Street is the 4th-tallest building in Boston (when measuring to pinnacle height), rising 623 feet (190 m). Apart from the mast, the roof of the building is flat and has no crown.