Batres Castle is the main attraction of town. It has a square floor plan and was built in the 15th century, with fired clay on flint foundations. It is peculiar because of the diamond shapes on the corners of the towers, which end in circular terraces at the top. The highest one, the keep, is 25 metres high. In the fortress there is a beautiful iron balcony, as well as an interior Renaissance courtyard with Plateresque galleries. In the castle there is also the so-called Garcilaso fountain, situated under a brick arch, framed by marble plaques with engraved verses.
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.