The Consolidated Edison Building (also known as the Consolidated Gas Building and 4 Irving Place) is a neoclassical skyscraper in Gramercy Park, Manhattan, New York City, United States. The 26-story building was designed by the architectural firms of Warren and Wetmore and Henry Janeway Hardenbergh. The building takes up the western two-thirds of the block bounded by East 14th Street to the south, Irving Place to the west, 15th Street to the north, and Third Avenue to the east. It serves as the headquarters of energy company Consolidated Edison, also known as Con Ed. The site formerly contained Tammany Hall and the Academy of Music, as well as the offices of Con Ed's predecessor, Consolidated Gas. The gas company was originally headquartered at 15th Street and Irving Place, but had outgrown its original building by the 1910s. As a result, Hardenbergh designed an expansion for the existing headquarters, which was constructed from 1911 to 1914. This expansion was later incorporated into a larger structure built by Warren and Wetmore between 1926 and 1929. Upon completion, the building's design was lauded by local media, and its "Tower of Light" became a symbol of the local skyline. On February 10, 2009, the building was declared a New York City designated landmark. History Site The site was originally occupied by the Lenape Native Americans until 1651, when a large tract from Bowery (now Fourth Avenue) to the East River between 3rd and 30th Streets was given to New Netherland director-general Peter Stuyvesant. While the Stuyvesant family retained much of their land through the 18th century, some of the Stuyvesant estate were bought in 1748 by Cornelius Tiebout, whose widow later passed ownership of the land to her son, Cornelius T. Williams. The current building's site includes land from Stuyvesant, Williams, and auctioneer David Dunham. When the Manhattan street grid was laid out with the Commissioners' Plan of 1811, space was provided for what would become Union Square, one block west of the present-day Consolidated Edison Building, which opened in 1839. To the east of the square, between Fourth and Third Avenues, a community of rowhouses as well as a north–south street called Irving Place were developed by Samuel B. Ruggles. The block now occupied by the Consolidated Edison Building was originally occupied by buildings of various uses, including rowhouses on 15th Street, the Fifteenth Street Presbyterian Church, and the New York University School