One of New York City’s first landmarks, the building is noted as an unusual example of the Greek Revival style, due to the façade’s dual monumental Doric columned porticos. The interior rotunda, featuring a towering saucer dome and grand Corinthian columns showcases the most advanced type of stone construction of its period. The original design was conceived by architects Alexander Davis and Ithiel Town, with further modifications by the sculptor John Frazee and architect Samuel Thompson.
The building served as a Custom House from 1842 to 1862, after which it became the largest of six U.S. Sub-Treasuries. Massive fortified steel and concrete vaults were installed in the main rotunda and in the basement during the late 1800s.