Which canaidian capital city is the only walled in north america outside mexico?

The only walled city in North America outside of Mexico is Quebec City, which is the capital of the Canadian province of Quebec. Quebec City's fortifications were built in the 17th and 18th centuries to protect the city from attack by the British and Americans. The fortifications include stone walls, gates, and towers, and they are considered to be one of the best examples of military architecture in North America.