Castle of Arnoia – Celorico de Basto
The oldest known documented reference regarding the Castle of Arnoia dates back to 1064, alluding to the Castellum Celorici et oppido ibi.
This Castle falls within the military architecture of the Romanesque period, featuring elements that contribute to its insertion into this style: the keep; the existence of a single door (the multiplication of openings made the Castle’s defence more vulnerable), the underground cistern in the walled courtyard (with the aim of preserving rainwater in case of an eventual siege warfare) and, finally, the broad chemin de ronde, which defines a triangular plan