The Walker is an excellent example of an early Canadian theatre designed for serious dramas, operas and musicals. Opened in 1906, it was run by C.P. Walker, whose New York connections brought in international stars and a dazzling array of productions. Nationally important political rallies held here included meetings of the women's suffrage and labour movements. Designed by Howard C. Stone, the Walker was notable in its day for such features as fireproofing, the arched ceiling resembling the Auditorium Theater in Chicago, and the inexpensive "gods" section of seating.

The Walker Theatre continues to serve as a live performance venue, operating as the Burton Cummings Theatre for the Performing Arts.