Royal York Hotel
Designed in the Château style by Ross and Macdonald Architects and Sproatt and Ralph Architects, the Royal York Hotel was constructed for the Canadian Pacific Railway in 1928-29, as part of a coast-to-coast chain of grand railway hotels. With 28 floors, the hotel was briefly the tallest building in Toronto and contributed to the city's changing skyline.
Built across from Union Station, the Royal York is the third hotel on this site: In 1843, the Ontario Terrace (later Sword's Hotel) opened and later hosted guests in Toronto for government business at the nearby parliament buildings. From 1862 until 1927, the Queen's Hotel hosted prestigious Canadian and international visitors, including Sir John A. Macdonald, Edward, Prince of Wales, and Jefferson Davis.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.