33 Arch Street is a contemporary highrise in the Financial District and Downtown Crossing neighborhoods of Boston, Massachusetts. The building was completed in 2004 after three years of construction, which began on June 5, 2001. It is tied with the State Street Bank Building as Boston's 20th-tallest building, standing 477 feet (145 m) tall, and housing 33 floors. The 33rd floor is 392 feet (119 m) above grade and the top of the cooling tower screen is 429 feet (131 m) above grade.