Peña de Martos Castle is located in the foothills of Las Cordilleras Béticas, in La Peña hillsides. A great panoramic view of the Guadalquivir valley can be seen from its location.
During the Middle Ages, Martos had one of the most impressive fortresses in Andalucía. It was formed by two castles. One built in La Peña from which its name was taken, and De la Villa Castle built in the very center of the town. La Peña castle remains belong to the fortress that los calatravos (Order of Calatrava) built in 1340.
It has a trapezoidal floor adapted to the meseta surface on which it lays. Its entrance, for security reasons, has a zig-zag design. The enclosure is divided into the Alcázar or castle and the parade ground is protected by a fortified enclosure. The Alcázar, where the keep is raised, is built over a natural pedestal 3m above the parade ground, separated by a natural moat. On the northeast side, the lower part of the castle, there is a reservoir that collects water from the rain that falls over a raised, rectangular area built of stone.
Builders took great advantage of the La Peña meseta surface by building walls where the land sloped most steeply. These walls were built as retaining walls with the parapet at the same level as the parade ground.
The area of Martos has been inhabited since remote times. In the 5th century, the Iberians built the oppidum de Tucci. During the years 17 and 14 B.C, being Emperor Augustus, the Romans founded the colony Augusta Gemella Tuccitana, part of the Bética province. Later on, Muslims built the first fortress that strengthens the enclosure.
From 1228, Martos became the center of La Encomienda of the Order of Calatrava in Jaén Reign. Calatravos strengthened La Peña defensive system and built the Keep. They also built the chapel, reservoir, oven, mill and winery.
The fortress was attacked continuously by Muslims until the conquest of Granada. Once the fortress had no military interest, its decline started.
During the 16th century, La Peña castle was abandoned.
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.