Château Ramezay
Montreal, Old Montreal. Few buildings carry as many regimes under one roof. Built in 1705 for Claude de Ramezay, governor of Montreal, it later passed to the fur-trading Compagnie des Indes, then served British governors after the conquest. When American forces seized Montreal in 1775 it became the Continental Army's Canadian headquarters, and Benjamin Franklin stayed a night there in 1776.
That episode is the one to come for: a reminder that Quebec could have become American and did not. It was the first building proclaimed a historical monument in Quebec and has been a museum since 1894, so it works in any season. Its exhibition on the American Revolution and Quebec runs until March 2027.
More about Château Ramezay