The Audubon Theatre and Ballroom, generally referred to as the Audubon Ballroom, was a theatre and ballroom located at 3940 Broadway at West 165th Street in the Washington Heights neighborhood of Manhattan, New York City. It was built in 1912 and was designed by Thomas W. Lamb. The theatre was known at various times as the William Fox Audubon Theatre, the Beverly Hills Theater, and the San Juan Theater, and the ballroom is noted for being the site of the assassination of Malcolm X on February 21, 1965. It is currently the Audubon Business and Technology Center, which is part of Columbia University's Audubon Research Park. History The Audubon Ballroom was built in 1912 by film producer William Fox, who later founded the Fox Film Corporation. Fox hired Thomas W. Lamb, one of the foremost American theater architects, to design the building. The building contained a theatre with 2500 seats, and a second-floor ballroom that could accommodate 200 seated guests. During its history, the Audubon Ballroom was used as a vaudeville house, a movie theater, and a meeting hall where political activists often met. In the 1930s, Congregation Emes Wozedek, a synagogue whose members were predominantly immigrants from Germany, began to use basement rooms of the Audubon Ballroom to conduct its religious services. At around the same time, several trade unions, including the Municipal Transit Workers, the IRT Brotherhood Union, and the Transport Workers' Union, utilized the meeting rooms. In 1950, the congregants purchased the building, and they continued to hold services there until 1983. Among the many events held at the Ballroom was the annual New York Mardi Gras Festival. After Malcolm X left the Nation of Islam in 1964, he founded the Organization of Afro-American Unity (OAAU), whose weekly meetings were held at the Audubon Ballroom. It was at one of those meetings, on February 21, 1965, that Malcolm X was assassinated as he was giving a speech. Because of non-payment of property taxes, New York City took possession of the theatre in 1967. Nevertheless, in the 1960s and 1970s, the Ballroom operated as the San Juan Theater, showing films which catered to the increasingly Hispanic neighborhood. It closed in 1980, and the building remained vacant and the exterior deteriorated. Adaptive reuse In 1989, Columbia University, with the Port Authority of New York and New Jersey as a partner, reached an agreement with the city, and in 1992