The city of Lleida was conquered from the Moors by the Count Ramon Berenguer IV of Barcelona in 1149, and the see was again transferred to its original seat.

La Canal says that the diocese was erected in 600, but others maintain it goes back to the third century, and there is mention of a St. Lycerius, or Glycerius, as Bishop of Lleida in AD 269.

[6] The regulations of the Council were adopted by the General Canon Law of the Roman Catholic Church for implementation in all dioceses.

[7] The signatures of other bishops of Lleida are attached to various councils up to the year 716, when the Moors took possession of the town, and the see was removed to Roda.

The city of Lleida was conquered from the Moors by the Count Ramon Berenguer IV of Barcelona in 1149, and the episcopal see was again transferred to its original seat.

A council in 1246 absolved king James I of Aragon from the sacrilege of cutting out the tongue of the Bishop of Girona.

Besides 395 churches for public worship, there were in the diocese five religious communities of men, six of women, and several hospitals in charge of nuns.

In 1995, following the Ilerdensis et Barbastrensis de finum mutatione decree, 84 culturally Catalan La Franja parishes that had traditionally belonged to the Roman Catholic Diocese of Lleida for over eight centuries, were segregated and transferred to the Roman Catholic Diocese of Barbastro-Monzón.

The decree and the ensuing controversies were perceived as anti-Catalan measures by many in Lleida and in the concerned parishes, as they were not previously consulted, and part of a strategy to assimilate the La Franja people into the Spanish-speaking mainstream congregation by cutting them off from their cultural roots.