Meetings of Parliament 1841-1866
Following the destruction by fire on 25th April 1849 of the building in Montreal used by the Legislature of the Province of Canada, the sessions of 1850, 1851, and 1856 to 1859 were held in Toronto in the buildings erected between 1829 and 1832 for the Legislature of Upper Canada and occupying the square bounded by Wellington, Simcoe, Front and John Streets. Other sessions were held at Quebec, 1852 to 1855, 1860 to 1865, and at Ottawa in 1866.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.