This little church, occupying a small plot between two streets in the old town, was built originally in the 12th and 13th centuries, and started falling down, bit by bit, in the 17th and 18th.

It is now an open-air concert and theatre space, with the walls now supported by steel and protected by large transparent panels where there are mural paintings. It is interesting to see what is the skeleton of a Romanesque ecclesiastical building revealed in this way.

One of the paintings behind a screen is said to show the martyrdom of Thomas à Becket, he of whom the English King Henry II said, allegedly, “Who will rid me of this troublesome priest?”, interpreted by his courtiers as an invitation to murder Thomas. It does make you wonder how this information got from Canterbury Cathedral to a little town in Castile.