San Marcos Castle is a 12th-century fortress, commissioned by Alfonso X 'The Wise' upon the remains of a Moorish mosque on the banks of Guadalete River. Despite being so old (800 years), the castle is preserved in perfect conditions of use. Cultural events, conferences, lunches or dinners can be held both inside or outside in the garden, for up to 300 people.
The inside of the old mosque is an ideal place for events and closing dinners for conferences and conventions, because of its historic atmosphere. During the summer, the area around the fortress is an incomparable venue for celebrating open-air events.
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.