Salvaterra de Miño has always carried out an important military function because of its strategic location next to the Miño River.
There is hardly anything left of the original 12th century walls that used to protect the castle. The fortress, however, built in the 17th century, still stands, and was refurbished in 2008. As well as many sentry boxes on the walls, other buildings were built such as the Baroque chapel (17th century) of La Virgen da Oliveira and the Casa del Conde house (17th century), with the Doña Urraca caves and double room with a spiral staircase can be found.Inside the fortress, as well as remains of streets, houses and gravestones, we can find the palace or manor house of Doña Urraca, named after the room of Queen Urraca I (1109-1126) during a war with the Countess Teresa of Portugal.
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.