One of the most important works of architecture in the Aragonese Mudéjar style.

This church combines Mudéjar, Renaissance and Baroque elements. If was built in the 14th century, and its highlights include its Mudéjar cloister and the octagonal tower, both dating from the 15th century. The tower is one of the highest Mudéjar-style towers in Aragon, and stands at almost 72 metres. The church has a spacious interior with a rectangular floor plan and three naves. The side chapels were opened starting in the 17th century. The church is also known as the collegiate church of Santa María la Mayor and is part of the Mudéjar architecture of Aragon, awarded the World Heritage designation by the UNESCO.