The Parliament Buildings
In 1859 the province of Canada began to erect its Parliament buildings. The architectural competition was won by Fuller & Jones for the legislative building and by Stent & Laver for the east and west blocks, housing the departmental offices. The chosen style was a robust Gothic Revival featuring rugged masonry, pointed openings, carved beasts and buttresses. First occupied in 1865, the complex housed the new Dominion government 18 months later. In 1916 fire razed the main block, though the exquisite library survived. The present centre block was designed by John A. Pearson and J. O. Marchand in an austere version of the Gothic style.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.