On February 12, 1920 it was announced that Marcus Loew of Loew’s Vaudeville Theatres had purchased lands on the Sound side of London Street (University Avenue) and the West side of Pelissier Street for a theatre. The theatre would be built in the “modern” single floor style with the cost of about $600,000. Loew’s Windsor Theatre took nine months to build and officially opened on New Years Eve, December 31, 1920. The name changed to the Capitol Theatre in 1922.
Designed by the prolific theatre architect Thomas White Lamb, the theatre was in his trademark style of Adam-Empire. One of sixteen Canadian theatres Lamb was to design, it held 1995 patrons. Lamb is best known in Canada for his design of Toronto’s Pantages, The Elgin and Wintergarden Theatres, and the Ottawa Capitol.