Seu Vella de Lleida
Lleida was an episcopal seat from very ancient times. The first known bishop, Sagiti, held this position in 419. That institution was lost following the Saracen invasion in 719. The bishopric of Lleida was restored in 1149 when the territory was recovered. It was established that all the mosques in the city would become episcopal property, and following this rule the Great Mosque was consecrated as a Christian in 1149 and in its place the first church was built (or recovered), the centre of episcopal power: Santa Maria l'Antiga.
The primitive church of Santa Maria l'Antiga (or Santa Maria in Sede ) has been identified with the buildings that still remain in the western wing of the cloister, and the canonical quarters should be located next to it. Later, when the cathedral was built, the old single-nave church would have been used as a quarter of the canonical church.