Besides the archaeological evidence that suggests an original wall from the late-antiquity period (fifth century), set around a small area, the walls date from the Middle Ages
Outside the walls, the Basilica of San Vicente was built in Caleno granite in a way that was greatly conditioned by the lie of the land and in the place where tradition situates the martyrdom and burial of Vincent, Sabina and Cristeta
Within the Ajates neighborhood (a suburb of medieval origin dedicated to stonemasonry), it was erected in the second quarter of the 12th century
The Dominican Monastery of Santo Tomás was built under the patronage of Hernando Núñez de Arnalt