The 12th century fortified church of Santa María de Ujué stands on the highest point of the town. It is a fine example of Romanesque architecture, with Gothic additions.
The church originates back to the 9th century when Iñigo Arista ordered a temple to be built next to the fortress that this king ordered to be built. This first pre-Romanesque church was demolished to erect a new Romanesque building in the 12th century under the auspices of King Sancho Ramírez. In the 14th century, Charles II ordered part of the Romanesque naves to be demolished in order to build a single Gothic building. The choir, the undertowers, the crenellated towers and the façades were also built, as well as the church was surrounded by promenades and walls. All of this gave the complex the appearance of a fortress that it still has today. Interred in the church is the heart of Charles II of Navarre.
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.