One of Toronto’s best examples of Art Moderne, the Carlu has been recognized as an architectural masterpiece and designated as a National Historical Site. Also known to many as the Eaton’s Seventh Floor, The Carlu was at the heart of Toronto’s cultural life for many years. The Auditorium played host to the major performers of its day, including Billie Holiday, Duke Ellington and Frank Sinatra. The first performance of the National Ballet of Canada was on the stage of the Eaton Auditorium. Canada’s own Glenn Gould, fond of the Auditorium’s excellent acoustics, used the hall for a number of his recordings.