The mediaeval Islamic Caliphate Rabita (Ribat in English) is situated in Park Alfonso XIII next to the site of the Phoenician city of La Fonteta near the River Segura’s mouth.
It is the only monastic Islamic monument from the Umayyad Andalusian period (10th-11th century AD) preserved almost completely. It consists of 23 praying cells, with its own Mihrab, organised around two main streets. In this monastery, you would have found religious men, the faithful who stayed here and pilgrims performing the Ribat. They were all attracted by the spiritual retreat required by Islam to its followers.
The finding of this Rabita is remarkable for its uniqueness. It is the first example of this type of religious building in the Iberian Peninsula.
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.