A titular bishopric in the province of Byzantium, mentioned as a free city by Pliny under the name of Matera (Hist. natur., V, iv, 5). Mgr. Toulotte ("Géographie de l'Afrique chrétienne", proconsulaire, 197) cites only two occupants of this see: Rusticianus, who died shortly before 411, and Quintasius, who succeeded him. Gams (Series episcoporum, 467) mentions four: Rusticianus, Cultasius for Quintasius, Adelfius in 484, and Victor about the year 556. Mater is now known as Mateur, a small town of 4000 inhabitants, in great part Christian, and is situated in Tunis. The modern town is encircled with a wall, with three gates; it is situated on the railway from Tunis to Bizerta, not far from the lake to which it has given its name.

Bibliography Information
Obstat, Nihil. Lafort, Remy, Censor. Entry for 'Mater'. The Catholic Encyclopedia. https://www.studylight.org/encyclopedias/eng/tce/m/mater.html. Robert Appleton Company. New York. 1914.

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Mater