The Diocese of Aquensis in Byzacena is a home suppressed and titular see of the Roman Catholic Church.^[1]

The diocese was centered on Aquensis a civitas of the Roman province of Byzacena, which is tentatively identified with El Hamma in modern Tunisia.^[2]

Mesnage,^[3] attributes two bishops:

• Gennaro, who took part at the Council of Cabarsussi in 393, made up of bishops Maximianus, Donatist sect;
• Crescente, that Victor of Vita, in his history of the persecution of the Vandals, calls metropolitanus Aquitanae civitatis'. Crescente name appears in the Roman martyrology on 28 November.

However, Morcelli,^[4] identifies only one bishop of this diocese – Vittoriano, who participated for the Catholic side, in the Council of Carthage (411).

Today Aquensis in Byzacena survives as titular bishopric^[5][6][7] and the current bishop is Nicolai Dubinin, O.F.M.Conv, Auxiliary Bishop of Roman Catholic Archdiocese of Moscow.^[8]