(Immediately subject to the Holy See)
Hippo Regius is the ancient name of the modern city of Annaba, Algeria. It historically served as an important city for the Phoenicians, Berbers, Romans, and Vandals. Hippo was the capital city of the Vandal Kingdom from 435 to 439 AD. until it was shifted to Carthage following the Vandal capture of Carthage (439).
Djelfa is the capital city of Djelfa Province, Algeria and the site of ancient city and former bishopric Fallaba, which remains a Latin catholic titular see.
The Catholic Church in Algeria is part of the worldwide Catholic Church, under the spiritual leadership of the Pope in Rome.
Sidi Fredj, known under French rule as Sidi Ferruch, is a coastal town in Algiers Province, Algeria. It is located within the territory of the municipality of Staouéli, on a presque-isle on the Mediterranean Sea. It is the site of the ancient city and bishopric Obori, which remains a Catholic titular see.
Mila is a city in the northeast of Algeria and the capital of Mila Province. In antiquity, it was known as Milevum or Miraeon, Μιραίον and was situated in the Roman province of Numidia.
Ziama Mansouriah is a town and commune in Jijel Province, Algeria. According to the 2008 census it has a population of 12,642.
Beniane is a town and commune in Mascara Province, Algeria at the site of ancient Ala Miliaria, a former bishopric which earns a Latin Catholic titular see.
Azura was an ancient civitas and bishopric in Roman North Africa– It remains only as Latin Catholic titular see.
Comba or Komba was a city in ancient Lycia.
Albulae is an ancient city and former bishopric in Roman Africa. It remains a titular see of the Roman Catholic Church. It is identified with the modern town of Ain Temouchent, in present Algeria, near the Moroccan border.
Germania in Numidia is a former ancient city and Roman bishopric and current Latin Catholic titular see. It was in the Roman province of Numidia.
Daldis, was a town on the borders of ancient Lydia and Phrygia, a former bishopric, and is now a Latin Catholic titular see. It also minted coins in antiquity with the legend Δαλδιανων. It also bore the name Flaviocaesaria or Phlabiokaisareia, which is not attested among ancient authors but is reconstructed from epigraphic and other evidence.
Musti in Numidia, also called Musti Numidiae, was an ancient city and bishop jurisdiction (bishopric), and is presently a Catholic titular see,(bishop's government see of a former government under a church's responsibility, also known as a dead diocese.) in modern Algeria.
Celerina is an Ancient city, former bishopric and present Latin Catholic titular see in North Africa.
Aquae Albae in Byzacena was an Ancient city and bishopric in Roman Africa and remains a Latin Catholic titular see.
Arae in Numidia was an Ancient city and bishopric in Roman Africa, which remains a Latin Catholic titular see.
Augurus was an ancient city and former bishopric in Roman Africa, now a Latin Catholic titular see. Its presumed site is at the ruins of Sidi-Tahar and Sidi-Embarec in Algeria.
Bagai was a Roman–Berber city in the province of Africa Proconsularis. It must have been of some reasonable size, as it was also the seat of an ancient Catholic bishopric. The ancient city has been identified with ruins at Ksar-Bagaï outside of Baghai, in the Aurès Mountains of the El Hamma District in Khenchela Province, Algeria.
Cediae (Cediæ) was an ancient city and former bishopric in Roman North Africa. It is now a Latin Catholic titular see.