of Dax, but good secondary education at Dax dates only from the establishment of the Barnabites in 1640. His learning, however, was sufficient to allow him to study at the University of Toulouse. On 3 June 1857, the title "Bishop of Dax" was added to the titulature of the Bishop of Aire. Bishops of Dax Early bishops Vincentius Gratianus Carterius (541) Liberius (549) Faustianus Nicetius Illidius Revelatus Sede Vacante (lasting nearly four centuries, due to Arab invasions and Northmen, until ca. 850) Oltherius (second half of ninth century) Bishops of Gascony Gombaud (end of tenth century) Arsius-Raca Raymond Raymond Bishops of Dax, 1000–1200 Macarius (ca. 1061) Gregory de Montaner, O.S.B. ( –1068) Bernard de Mugron, O.S.B. (by 1068 – 25 July 1097) Raymond de Sentes (before 1100 – 28 March 1117) Guillaume de Heugas (1117–1143) Arnaud-Guillaume de Sort (ca. 1143 – after 20 November 1167) Guillaume Bertrand (ca. 1168–1203) 1200–1400 ? Jean de Caunar (1203) Fortanerius de Mauléon (1204 – February 1215) Guilelmus de Salies (1217 – October 1233) Arnaud Raymond de Tartas (1234–?) Navarre de Miossenx, O.Cist. (1239 – 3 November 1272) Sede Vacante (1272–1278) Arnaud de Ville (5 April 1278 – 11 March 1305) Garsias Arnaud de Capenne (1305, before 12 September – 8 January 1327) Bernard de Liposse (19 January 1327 – February 1359) Pierre la Colre (15 March–15 April 1359) Pierre Itier (10 May 1359 – 1362) (resigned on becoming Cardinal) Bernard d'Albret [de Lebreto], O.Min. (Bishop-elect) (1 June–?, 1362) Jean de Saya (18 January 1363 – 8 June 1375) (transferred to Agen) Jean de Hanecourt [or Haricuria] (bishop-elect, died before consecration) (9 June–August, 1375) Jean Bauffès (27 August 1375 – 4 December 1391) (transferred to Vich) Joannes Guterii (Obedience of Rome) (March 1380 – late in 1393) Pierre Troselli, O.P. (Obedience of Avignon) (4 December 1391 – 9 March 1405? or 1412?) Pierre du Bosc (Obedience of Rome) (5 December 1393 – 19 June 1400) 1400–1600 Petrus Ameil de Brénac, O.E.S.A., Patriarch of Alexandria (Obedience of Rome), Administrator of Dax (19 June 1400 – 4 May 1401) Garsias-Arnaud de Navailhes (Obedience of Rome) (4 May 1401 – 1407) Pélegrin du Fau (1407 – 22 July 1408) Petrus de Anglada, O.P. (Obedience of Rome) (23 August 1409 – 1423) Nicolaus Duriche, O.P. (Obedience of Avignon) (27 May 1412 – 1423) Francesco Piccolpasso (29 March 1423 – 26 February 1427) (transferred to Pavia) Bernard de la Planche