Radio City Music Hall:
On the south facade of the hall along 50th Street are three large panels symbolizing dance, drama, and song. Designed by Hildreth Meiere, the plaques are the first examples of enameled metals used artistically on such a large scale. The panels were installed when Radio City Music Hall opened in 1932, and only hint at the elaborate decorations inside the theater.
(The above was from the Rockefeller Center: Visitor's Guide & Walking Tour brochure)