Columbia University was not making enough money from Rockefeller Center leases by the 1970s,[305] and the university started looking to sell the land beneath Rockefeller Center, including the RCA Building, in 1983.[306] That year, the New York City Landmarks Preservation Commission (LPC) held hearings to determine how much of Rockefeller Center should be protected as a landmark.[307] The Rockefeller family and Columbia University acknowledged that the buildings were already symbolically landmarks, but their spokesman John E. Zuccotti recommended that only the block between 49th and 50th Streets be protected, including the RCA Building and RCA Building West.[c] By contrast, almost everyone else who supported Rockefeller Center's landmark status recommended that the entire complex be landmarked.[309][310][311] The LPC granted landmark status to the exteriors of all of the original complex's buildings, as well as the interiors of the International Building's and 30 Rockefeller Plaza's lobbies, on April 23, 1985.[311][312][313][d] Rockefeller Center's original buildings also became a National Historic Landmark in 1987.[314]
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