 The Modern Classicism Dominion Public Building at 138 Wyndham Street North in Guelph, Ontario was built to house RCMP, Department of Agriculture, and post offices, and its construction contributed to the later demolition of the city's earlier post office and customs house.The building is currently in use by the County of Wellington.The Dominion Public Building at 45 Main Street East in Hamilton, Ontario, opened in 1935 as a post office replacing an 1880s structure.