[2] It succeeded an old Catholic cathedral dedicated to Saint-Hilarion in Laghouat which was secularized.
The pro-cathedral, or temporary cathedral of his jurisdiction, follows the Roman or Latin liturgical rite.
It serves as the seat of the Diocese of Laghouat (Dioecesis Laghuatensis), which was established by decision of Pope Pius XII by bull Dum Tantis.
The church is under the pastoral responsibility of Bishop John MacWilliam.
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