TARBIENSIS (Tarbes - Hautes-Pyrénées)Created in the fifth century.
TARENTASIENCIS (Moûtier-en-Tarentaise - Savoie)Created in the fifth century.
THOLONENSIS (Toulon - Var)Created in the fifth century by dividing the See of Arles.
THOLOSANENSIS (Toulouse - Haute-Garonne)Created in the third century. Archbishopric created on the 26 May 1317.
THOMERIARUM (Saint-Pons-de-Thomières - Hérault)Created on the 1 March 1318 by dividing the See of Narbonne.
TRECENSIS (Troyes - Aube)Created at the beginning of the fourth century.
TRECORENSIS (Tréguier - Côtes d'Armor)Created in the ninth century.
TRICASTINENSIS (Saint-Paul-Trois-Châteaux - Drôme)Created in the fourth century.
TULLENSIS (Toul - Meurthe-et-Moselle)Created in the fourth century.
TURONENSIS (Tours - Indre-et-Loire)Mentioned in the fourth century.
TUTELLENSIS (Tulle - Corrèze)Created on the 13 August 1317 by dividing the See of Limoges.