Castrillo del Val is a municipality located in the province of Burgos, Castile and León, Spain.

This abbey was the burial place of El Cid, the 11th century warrior, his wife Jimena Díaz and, supposedly, his horse Babieca.

[2] The remains were removed during the Napoleonic Wars when occupying troops ransacked tombs looking for treasure.

During the Spanish Civil War the monastery was used as a concentration camp, and its female prisoners were experimented on by Antonio Vallejo-Nájera in order to find a link between intellectual disability and Marxism.

This article about a location in the province of Burgos, Spain is a stub.