The Citadel of Quebec is a historic fortress located in Quebec City, Canada. Built between 1693 and 1698, it is one of the oldest military structures in North America. The citadel is part of the Old Quebec UNESCO World Heritage site and offers stunning views of the St. Lawrence River. This star-shaped fortification was designed to protect the city from potential attacks. It has served various military purposes over the centuries and is still an active military installation today. Visitors can explore its ramparts, museums, and learn about its significant role in Canadian history.