in 1915 and was used for showrooms. By the 1920s, however, Consolidated Gas had expanded into the outer boroughs, and there was need for even more office space. In 1925, the company purchased the Academy of Music, which hosted its last show the following May. Consolidated Gas commissioned Warren and Wetmore, which had previously designed some of the company's branch offices, as well as T.E. Murray, Inc., which built boiler plants and power-generating stations. Blueprints were submitted to the New York City Department of Buildings by October 1926 and the expansion was completed a little over two years later. The Tammany Hall building on 14th Street was sold to Joseph P. Day and J. Clarence Davis, of real estate syndicate D&D Company, in December 1927. The society planned to relocate to the nearby 44 Union Square East, which was then under construction. D&D sold the Tammany building again to Consolidated Gas in January 1928. There were allegations that Tammany leaders profited from the sales, which Tammany leader George Washington Olvany denied. Day, a long-time member of Tammany Hall, eventually agreed to give the $70,000 profit from the sale to Tammany. Tammany Hall remained in its old headquarters until July 4, 1928, so it could celebrate the U.S. Independence Day at that location. Immediately afterward, it moved to a temporary space at 2 Park Avenue. Plans for an annex were submitted to the Department of Buildings in September 1928 and the annex was finished by the following November. After the completion of this expansion, the Consolidated Gas building contained of floor area, used by 7,000 employees. Use A 1932 guidebook stated that Consolidated Gas had become the "largest company in the world providing electrical service". Four years later, Consolidated Gas was incorporated as the Consolidated Edison Company of New York, and its headquarters were renamed accordingly. By the 1970s, the headquarters had 6,000 employees. Con Ed continued to expand into adjacent states, though it still retains its headquarters at Gramercy Park. The ground floor space was rented out to various tenants, including First National City Bank (now Citibank). In 1975, the Fuerzas Armadas de Liberación Nacional Puertorriqueña, a Puerto Rican nationalist group, claimed responsibility for a bombing that caused minor damage to the building, but injured no one. The group also claimed responsibility for a similar bombing at the same site in 1978, which also caused little damage. By 2010, the