Collegiate Church of Santa María, Calatayud Monument · Calatayud, Comunidad de Calatayud, Zaragoza The Colegiata de Santa María la Mayor, also called de Mediavilla because of its location in the centre of the medieval town, is the main church of Calatayud and a masterpiece of Aragonese Mudéjar, declared a UNESCO World Heritage Site in 2001. According to tradition it was built over the former main mosque, purified after the conquest by Alfonso I the Battler in 1120, a hypothesis supported by archaeological finds beneath the current apse. A Romanesque church replaced it in 1249, and after suffering damage in the War of the Two Pedros it was rebuilt between the late 14th and early 15th centuries under the patronage of Pope Luna, incorporating the Mudéjar tradition. From that period the cloister and the lower sections of the apse and the tower, more than 70 metres high, are preserved. Photo: Ignasilm (CC BY-SA 3.0 es) What to see and do in Calatayud