The church of Antillon has its origins in the twelfth century, in Romanesque style, but with successive additions throughout the centuries. What keeps aour attetion is a tomb that hangs on the wall outside the church. This strange tomb contains the remains of Sancho de Antillon, whose story is interesting:

Sancho de Antillon joined King Peter II of Aragon at the battle of Navas de Tolosa, in which the Christian kingdoms of Spain stopped a Muslim invasion. In the fields of northern Jaen, Christian troops destroyed the army commanded by Amir Al Muslimin (Miramamolín, for Christians of the time). This glorious victory was not well rewarded to the Aragonese king and his faithful servant Sancho de Antillon. Another battle, a few years later, was a disgrace for these characters. At Muret, Occitan and Aragonese troops were defeated by troops of the king of France and Pope Innocent III. This battle was the final chapter of the war against the Cathars. The king of Aragon wnet to defend the Occitan, where the Albigensian heresy was located. In Muret, King Peter II of Aragon sent his troops against the army commanded by Simon de Monfort. King Peter II of Aragon died in battle, and with it his best knights. The Pope, in revenge, provides that the defeated can not be buried, and decrees that are left as pasture for the scavengers. However, a group of Aragonese knights return to their homeland with the remains of Pedro II and his most important warriors. Sancho de Antillon was one of those knights who died at Muret.