Museo Histórico Militar de Cartagena is a military museum dedicated to Spanish Army History. Originally rectangular in shape, it had an area of 17,302 m2, formed by four pavilions and a central one that divided it into two bodies with its two courtyards. The Patio of Weapons or Ironworks is the one that is totally conserved.
The first body of the current building is used by the Municipal Archive of Cartagena, the rest is the Museum. Designed by the architect Mateo Vodopich and built between 1777 and 1786.
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.