30 Rockefeller Plaza was developed as part of the construction of Rockefeller Center. Work on the steel structure of the RCA Building started in March 1932. It opened in mid-1933 after a delay caused by a controversy over "Man at the Crossroads", a painting by Diego Rivera that was removed from the RCA Building. Shortly after the RCA Building's opening, there were plans to use the building above the 64th floor as a public "amusement center", which became the Rainbow Room and Top of the Rock. 30 Rockefeller Plaza underwent a $170 million floor-by-floor interior renovation in 2014.