Under the command of Nicolau de Langres, the Ouguela fortress takes on a new configuration and includes numerous bastions and revelins, a moat, roundabouts, quarters and a large quadrangular cistern, with 12 meters on the side, located in the square of arms of the village.

The Ouguela cistern was the target of an intervention at the end of the 20th century and it is currently possible to visit it by going down the 15 steps that lead to its interior.