In the heart of the city of Calais stands the Tour du Guet (Watchtower) — a silent witness to centuries of history and rightfully considered the city's oldest surviving building. This 13th-century medieval structure, nearly 39 meters high, was once a key observation point used to monitor ships approaching from across the strait. 
This massive stone building in France is located on the main square, Place d'Armes. The tower stands out for its austere architecture and unique details, such as an ancient dovecote that was used for postal communication in the past. For the city's residents, it is not just a monument but a symbol of resilience that has survived numerous sieges and natural disasters.
Today, the Tour du Guet serves as a magnificent landmark for tourists and a beautiful backdrop for photographs. A statue of Charles de Gaulle is installed nearby, creating an interesting dialogue between the medieval past and the country's modern history. Despite its venerable age, the tower retains its grandeur and is a must-see on the itinerary of any traveler interested in European fortification architecture.