Residing over Plaza del Mercado Grande, San Pedro projection is similar to that of the Basilica of San Vicente. The monarchs swore their respect for the charters of Castile in the atrium of the church, which underlines its importance during the period in which the town achieved its greatest relevance in the world of politics.
San Pedro has a Latin-cross layout with a central nave that is larger than the side naves. Its construction began in the second quarter of the 12th century and was completed in the 13th century after a period in which the work was stopped. The architecture and decoration shows an evolution of particular interest as a result of the delays in the construction work.
It has a triple upper end with an apse on each nave and a magnificent collection of sculptures showing plant, animal and geometric motifs and scenes from the Bible. The ceilings were covered with barrel and groined vaults in the 13th century. Over time, the arches became forerunners to those used in the Gothic period. Finally, a tower was built on the place where the central nave intersects with the transept.
The main front has two bodies: the upper body is dominated by a large rose window and the lower body has a porch in which the size of the entrance is magnified by six plain archivolts. The southern porch is similar but smaller in size. The northern entrance is more ornamental and moulded with five archivolts, two of which are decorated with typical Ávila-style rosettes.The interior stands out thanks to the panels distributed around the walls of the nave, the Renaissance-style altars and the altarpiece in the main chapel, together with its grilles.It was designated a National Monument in 1914.
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.