The Custom House in Boston, Massachusetts, was established in the 17th century and stood near the waterfront in several successive locations through the years. In 1849 the U.S. federal government constructed a neoclassical building on State Street; it remains the "Custom House" known to Bostonians today. A tower was added in 1915; the building joined the National Register of Historic Places in 1973 and was designated a Boston Landmark by the Boston Landmarks Commission in 1986.