It is a defensive fortress built between the 11th and 12th centuries as a defense of Galicia in its struggles between Alfonso Henríquez of Portugal and Alfonso VII of Galicia. It is located in the A Limia region, at a strategic point for the defense of our troops against the neighbor, Portugal. The latter ceded it to the bishopric of Ourense in 1157, which established a monastery of Hieronymite friars there. In the 14th century, it was occupied by the Duke of Lancaster and shortly after assaulted by the Irmandiños. It stands in the center of a platform corresponding to a much more complex fortification of which only a razed wall remains. Its plan is quadrangular with good masonry, a door with a pointed arch, and decorated corbels. From the top, you can perfectly see the towers of Sandiás, Pena, and Celme that completed the defensive set of the area. It is very well preserved and on the outside, you can see the small surveillance windows and the beveled loopholes that the archers would use. Inside, the four floors have been reconstructed with wood, which are accessed by steep stairs. On the lower floor, there is an information point about the Vía Nova.