Verismo (music) of the poor, that had not generally been seen as a fit subject for literature. A short story by Verga called "Cavalleria rusticana" (), then developed into a play by the same author, became the source for what is usually considered to be the first "verismo" opera: "Cavalleria rusticana" by Mascagni, which premiered on 17 May 1890 at the Teatro Costanzi in Rome. Thus begun, the operatic genre of "verismo" produced a handful of notable works such as "Pagliacci", which premiered at Teatro Dal Verme in Milan on 21 May 1892, and Puccini's "Tosca" (premiering at the Teatro Costanzi in
Edmonton Opera with them. After a number of successful productions, the group changed its name to the Edmonton Professional Opera Association, with David Ker as the first president and Letourneau as the music director. "Professional" was dropped from the company’s name in August 1966, as the then-artistic director, Irving Guttman, argued that it should be obvious to all if a company is professional. The first season, 1963/64, featured two productions: "Madama Butterfly" in October 1963, and "Cavalleria Rusticana" and "Pagliacci" in April 1964. In 1966, Letourneau convinced Guttman, then at the Vancouver Opera, to come to Edmonton. The artistic director from 1966