The American Stock Exchange Building, formerly known as the New York Curb Exchange Building and also known as 86 Trinity Place or 123 Greenwich Street, is the former headquarters of the American Stock Exchange. Designed in two sections by Starrett & van Vleck, it is located between Greenwich Street and Trinity Place in the Financial District of Lower Manhattan in New York City, with its main entrance at Trinity Place. The building represents a link to the historical practices of stock trading outside the strictures of the New York Stock Exchange (NYSE), which took place outdoors "on the curb" prior to the construction of the structure. The building was originally erected in 1921, thus improving the stature of the New York Curb Exchange, which had been a curbside exchange. The structure was enlarged between 1929 and 1931 following an increase in trading volume. The New York Curb Exchange was renamed the American Stock Exchange in 1953, and the American Stock Exchange moved out after merging with the NYSE in 2008. The structure was subsequently purchased by developers who planned to convert the building into a hotel. The original structure, facing Greenwich Street to the west, is designed in the Renaissance Revival style, with a set of large arched windows providing light to the former trading floor. The eastern expansion, on Trinity Place to the east, is designed in the Art Deco style as a 14-story building. The expanded structure contained offices and conference rooms, as well as an elaborately decorated facade with a central entrance and reliefs signifying the building's use. The American Stock Exchange Building was designated a National Historic Landmark in 1978 and was designated a city landmark by the New York City Landmarks Preservation Commission in 2012. It is also a contributing property to the Wall Street Historic District, a NRHP district created in 2007. Architecture The American Stock Exchange Building stands in the Financial District, occupying a parcel that extends from Trinity Place to Greenwich Street, just south of Thames Street. It is a fourteen-story steel frame structure, with its formal facade, finished in limestone, facing Trinity Place. It measures wide at its widest point, and has a frontage of on Trinity Place and on Greenwich Street. Both the original 1921 structure and its later enlargement were designed by the New York firm Starrett & van Vleck. The original structure was designed when most of Starrett