Whitehern
Set in a rare walled garden and enriched by its interior decoration, Whitehern is a remarkably intact example of mid-19th century residential architecture. The lingering influence of the Palladian style combined with Neoclassical motifs is seen most clearly in the symmetrical facade with its central frontispiece capped by a pediment, and in the sturdy yet graceful entrance porch supported by Ionic columns. Constructed about 1850, this house built of locally quarried stone reflected the affluence and status of the new business and professional elites emerging in pre-Confederation Canada.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.