The Mount Royal Club is a private social club in Montreal, Quebec. The club was founded as a gentlemen's club in 1899 by a breakaway group from the Saint James's Club, but in 1990 became mixed-sex. In its prime, the Mount Royal was Canada's most prestigious club and was an integral part of Montreal's Golden Square Mile society. During the age when Montreal was the center of commerce in Canada, the club's membership counted many of the country's most powerful executives, bankers, financiers, and industrialists. The Mount Royal's clubhouse on Sherbrooke Street was completed in 1906 and was designed by McKim, Mead & White of New York.