It was in this site where the Federal Hall is located that George Washington took the oath of office as first President of the United States on April 30, 1789. The Town & Davis design called for a classic Greek temple, in the image of the Parthenon, but crowned by a low central dome in the Roman tradition, visible from the street. The imposing Hall Street facade, above a broad flight of stairs, was designed with a monumental colonnade of eight Doric columns carrying a classical entablature and pediment with acroteria, with a second, smaller hexastyle colonnade in antis behind it.
The Rotunda is an interior space of imposing grandeur, and it is it is an outstanding example of the most advanced type of stone construction of its period. This use of stone was an early solution to the problems of fireproofing. The refined Greek Revival workmanship and detail of both the stone and the ironwork is outstanding.