Description: This defensive structure was improved during the reign of king D. Sancho I (1185 to 1211).
In 1409, during the reign of king D. João I, the defensive structures of the Castle are improved, and the big Donjon is built. The tower would suffer some alterations after 1640, during the Restoration War, with adaptation for the installation of artillery pieces.
The Castle defensive walls involves the historical nucleus of the town, with an area of about 3 hectares.
The “cidadela” is marked by the Donjon, with 17 meters on the side and 34 meters high.