The Macdonald-Mowat House 1872
Sir John A. Macdonald, Canada's first prime minister, purchased this house in 1876 and lived here 1876-78. It was built in 1872 in the French Second Empire style by Nathaniel Dickey, a Toronto iron founder. Macdonald owned the property until 1886 and it was occupied by his son, Hugh John, 1879-82. The Hon. Oliver Mowat, prime minister of Ontario, bought and occupied the house in 1888 and retained ownership until 1902. The property was leased, 1897-98, to the Hon. Arthur Sturgis Hardy who succeeded Mowat as prime minister and sold to Knox College in 1910.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.