Built in the 12th century, San Pedro de la Rúa is the oldest church in Estella. The sanctuary dating from the end of the 12th century is still standing. It has three naves, dating from around the 13th century. The chapel of San Andrés is Baroque and has a Rococo altarpiece. At the foot of the church there are baroque stalls and a font. The exterior cloister has a square plan and in it there are decorated capitals that narrate the life of Saints and Christ, along with plants and animal reliefs.
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.