As a result of being a coastal town and needing to protect itself from attack, St Tropez became well-fortified early on in its history. You can now visit three towers scattered across the city's coastline.
Originally, four towers were built to protect the coast and the port: Tour du Portalet, Tour la Vieille, Tour de Suffren, now lost, and the Tour Jarlier.
The Tour du Portalet and the Tour la Vieille, or Old Tower, look right out over the sea and are situated on either side of a cove called La Glaye, watching the entrance to the town from the Mediterranean. These two towers date from the 15th century and are situated in the historical fishermen quarter of La Ponche.
The last tower, and the most central one, is to be found on Rue Jarlier. This structure, built a little later than the others, dates from the 16th century. It confers a tranquillity and charm upon a street which is of considerable architectural interest.
The Tour Suffren bore the name of the ancient lords of Saint Tropez. Even if the tower is now lost, you can see the castle which they turned into their family home in the 18th century, in Saint Tropez's main square. It cannot be visited, but you can see its imposing stone exterior.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.