Standard Woollen Mills Building
This former industrial building was constructed in phases over two decades as Standard Woollen Mills expanded its operations. The earliest portion, constructed in 1882 and distinguished by its buff and blackened brick detailing, was designed by E.J. Lennox, one of Toronto's most celebrated architects. The plain, red brick eastern section and fourth floors were later additions. Owned by Standard Woollen Mills until 1926, the building was converted for use by the Canadian Opera Company in 1987.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.