San Felices de los Gallegos Castle has an historical purpose as the frontier stronghold between Portugal and Castile. The enclosure with medieval origins is protected by the castle and the walls which were built in successive periods. The wall, built of stone blocks with adjoining square towers, dates from the 13th century and encircles a spacious bailey. The keep dates from the 15th century, and a third fortified enclosure with bastioned walls dates from the 17th century.
Inside the walls, it is worth noting the parish church (12th-13th centuries) in the transitional Romanesque style (façade and belltower) modified in the Gothic-Renaissance period (16th century), with three naves and a main chapel.Highlights of its civil architecture are buildings such as the Town Hall (16th century) and the Alhóndiga, the former hospitals of Rocamador and La Misericordia, and various noble mansions with their carved coats of arms (16th to 18th centuries), such as the houses known as Los Mayorazgos, El Corregidor and Los señores de Ron.
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.