The building opened in 1905 as the
La Plaza Theatre, an
Edwardian vaudeville stage. Seating almost 700, it was the main entertainment venue in the primarily working-class neighbourhood. As films eclipsed vaudeville, the theatre was turned into a cinema, continuing to use the name La Plaza Theatre until the 1960s, and later under a series of other names. As
multiplexes made large single screen venues no longer viable as cinemas, it became a performing arts venue. In the late 1980s, it was home to the successful gospel musical
Mama, I Want to Sing!. In early 1989, it was renamed "The Opera House" and became a music venue. In 2023, the Opera House was acquired by Live Nation Canada and added to their venue portfolio. ==Other uses==