Which Canadian city is known for its historic district, "Old Quebec"?

Quebec City is renowned for its historic district, known as "Old Quebec." This area is recognized for its well-preserved colonial architecture and its significant historical importance, reflecting the city's rich French heritage. Old Quebec is a UNESCO World Heritage Site, characterized by its narrow streets, stone buildings, and landmarks such as the iconic Château Frontenac. The district serves as a cultural hub, drawing visitors who are interested in history, architecture, and the unique atmosphere of this old fortified city. This distinction sets Quebec City apart from the other cities listed, which, while having their own attractions and historic sites, do not have a heritage district equivalent to Old Quebec.