The church of Nuestra Señora de la Sey, which was the seat of the Visigoth bishopric, stands out among the buildings in town. The Visigoths likely built the church over a Roman temple dedicated to the indigenous god Airón that the Romans adopted. A Romanesque church followed in the 12th and 13th centuries with three naves and three apses, unique in the province. And in the 16th and 17th centuries locals renovated the church again to its current state.
Attached to the church are the sacristy and the Parish Museum. This museum holds artistic treasures such as Baroque canvases, a mudejar ceiling, Roman funerary stelae, Visigothic architectural elements, and an altar made of Talavera tiles.