Consumers' Gas Company Purifying House 1888
Designed in the Renaissance Revival style by architects Strickland & Symons, this building was part of a major expansion of the Consumers' Gas Company manufacturing plant. The final stages of coal gas production took place in the Purifying House, where impurities were removed from the gas prior to its sale for heating and lighting. Gas production ceased here in the 1950s. In 1985, the building was adapted for use by the Canadian Opera Company.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.