The legend of the foundation of Daroca is lovely: they say that 800 years ago, six consecrated wafers were wrapped in a piece of cloth or “altar cloth” and hidden to protect them from the Arab sacking of Daroca. On recovering them, the wafers appeared to be stuck to the altar cloth and bathed in blood. Commandants from various parts of Spain fought for them.
Because of this, they decided to load the altar cloth on the back of a mule: wherever it went, there the altar cloth would stay. The mule wanderedfor 12 days, and finally returned to Daroca, where a church was constructed – the Basilica of Santa María de los Sagrados Corporales- to keep this divine gift.