Marble was imported from Europe for the interior columns and colonnade. Lady Eaton arranged for two entire rooms to be removed from two manor houses in England and reassembled in the furniture department of the College Street store. The French architect Jacques Carlu (who later designed the Rainbow Room in New York City and Eaton's Ninth Floor (or the "9ième") in Montreal), was retained to design the interior of the Eaton's Seventh Floor, including the 1300-seat Eaton Auditorium and the elegant Round Room restaurant. The Eaton's Seventh Floor, considered an Art Moderne masterpiece, was at the heart of Toronto's cultural life for many years. The Auditorium hosted major performers of its day, including Billie Holiday, Duke Ellington, Frank Sinatra, and the National Ballet of Canada. The noted Canadian pianist Glenn Gould, fond of the Auditorium's excellent acoustics, made a number of his recordings of music in this hall.