Kingston Custom House
Designed by the Montreal architectural firm of Hopkins, Lawford and Nelson, the Kingston Custom House was built in 1856-59 for the government of the united Canadas. The symmetrical composition of the two-storey ashlar building, surmounted by a restrained cornice and parapet, draws on the British classical tradition. The orderly design is achieved through repeated use of semi-circular forms for doors and windows. The Custom House and the nearby Post Office are fine examples of the architectural quality of mid-nineteenth century administrative buildings.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.