63 Nassau Street is a landmark building located between Fulton and John Streets in the Financial District of Manhattan, New York City. It was built in the Italianate style c.1844, and had its cast-iron facade, attributed to James Bogardus, added in 1857-59, making it one of the first cast-iron buildings in the city. The attribution to Bogardus, a pioneer in the architectural use of cast iron, comes because of medallions of Benjamin Franklin identical to those on four other Bogardus projects, all now demolished. George Washington was also once represented with medallions.