Map showing Roman Tusuros

During the Roman Empire and the Byzantine Empire and in the Vandal Kingdom, Tozeur was the site of Tusuros, in the Roman province of Byzacena (originally part of Africa Proconsularis).

Bishopric

At this time it was the seat of a suffragan bishopric, called Tusuros.[1]

Located in the Sahel hinterland of the Byzacena coastline, close to the towns of Aquae and Nefta and south of Capsa and Ad Turres,[2] Roman Tursuros became an important center of Donatism.[2]

The bishopric ceased to function following the seventh-century arrival of Islam. The remains of an ancient church are visible in the foundations of an old mosque of Tozeur.

Four bishops (two canonical, two schismatic Donatist heretics) are historically documented

Bennatus, partook in the Council of Cabarsussi, held in 393 by Maximianists, a sect of dissident Donatists, and signed their acts. Asellicus, 4th-century bishop, known from correspondence with Augustine of Hippo and Donatian of Reims and from tracts against one Aptus who was accused of Judaising.[3][4] He attended the Council of Carthage (411) where the prevailing Catholics condemned Donatism as heresy. Florentinus participated in the Council of Carthage called in 484 by the Arian king Huneric of the Vandal Kingdom, whereafter he was exiled like most Catholic bishops, unlike Aptus, Asellicus' Donatist rival.[4]Titular see

It was nominally restored in 1933 as Latin titular bishopric of Tusuros (Latin) / Tusuro (Curiate Italian) / Tusuritan(us) (Latin adjective) of the Roman Catholic Church.[5]

It has had the following incumbents, so far of the fitting Episcopal (lowest) rank:

Joseph Leo Cardijn (born in Belgium) (15 February 1925 – 22 February 1965), Founder of the international Young Christian Workers (CAJ) then without prelature; later created Cardinal-Deacon of San Michele Arcangelo [it] (25 February 1965 – 25 July 1967, his death); Giovanni Benelli (11 June 1966 – 3 June 1977) as papal diplomat: Apostolic Pro-Nuncio to Senegal (11 June 1966 – 29 June 1967), Apostolic Delegate to Western Africa (11 June 1966 – 29 June 1967) and Roman Curia official: Substitute for General Affairs of Secretariat of State (29 June 1967 – 3 June 1977); later Metropolitan Archbishop of Florence (Italy) (3 June 1977 – 26 October 1982), created Cardinal-Priest of Santa Prisca (27 June 1977 – 26 October 1982, his death); Thomas Cajetan Kelly (12 June 1977 – 28 December 1981) as Auxiliary bishop of Archdiocese of Washington (D.C.. United States) (12 June 1977 – 28 December 1981); later Metropolitan Archbishop of Louisville (United States) (28 December 1981 – 12 June 2007, his retirement), died in 2011; Paul Lanneau (14 February 1982 – 26 January 2017, his death), first as Auxiliary Bishop of Archdiocese of Mechelen-Brussels (Belgium) (14 February 1982 – 20 March 2002), then as emeritus; Bishop-elect Amilton Manoel da Silva, Passionists (C.P.) (7 June 2017 – present) as Auxiliary Bishop of Archdiocese of Curitiba (Brazil).