Adrien de Brimont (1862). Un Pape au moyen âge. Urbain II (in French). Paris: Ambroise Bray. pp. 243–285. D. C. Munro, "The Speech of Pope Urban II at Clermont," American Historical Review, XI (1906), 231—242. R. Somerville (1976), 'The Council of Clermont and the First Crusade', Studia Gratiana, 20 (1976), pp. 335-337.
Bishop Avitus is said to have founded a monastery at Volvic, at the tomb of Bishop Praejectus. He ruled for fifteen years, and passed the diocese on to his brother Bonitus. Armand G. Mallay (1838). Essai sur les églises Romanes et Romano-Bysantines du département du Puy-de-Dôme (in French). Moulins: Desrosiers. pp. 28–29. Tardieu, p. 183. Duchesne, p. 38 no. 26.
Gilbert was the first Bishop of Auvergne to call himself Bishop of Clermont. R. Twigge, "Medieval Service Books of Aquitaine, IV. Clermont-Ferrand," Nicholas Patrick Wiseman, ed. (1897). The Dublin Review. Vol. Vo. CXXI. London: Burns and Oates. pp. 355–377, at 356.
Bishop Thomas Duprat, a native of Issoire, was the brother of Antoine Duprat, Chancellor of France. He opened a new university at Issoire in the diocese of Clermont in 1519, but it was forced to close in 1520 because of pressure from the University of Paris and Charles, Duc de Bourbon. M.G. des Devises du Dezert, "L'enseignement secondaire et supérieur à Clermont-Ferrand," Association française pour l'avancement des sciences (1908). Clermont-Ferrand et le Puy-de-Dôme: Congres de l'Association française pour l'avancement des sciences, 1908 (in French). Société anonyme du "Moniteur du Puy-de-Dome" et des imprimeries G. Mont-Louis. p. 287. Duprat died at Modena in 1528, where he had been sent as Ambassador Extraordinary to conduct Renée of France, daughter of Louis XII, to her marriage to the Duke of Ferrara.
Boyer was later Archbishop of Bourges (1893-1896). He was named a cardinal by Pope Leo XIII on 29 November 1895; he received the red hat and was named Cardinal Priest of Santissima Trinità dei Monti on June 25, 1896. He died in Bourges on December 16, 1896. Abbé Fouilhaux, in: Société bibliographique (France) (1907)., L'épiscopat français..., pp. 199-200.
jstor.org
Robert Somerville (1974). "The Council of Clermont (1095), and Latin Christian Society". Archivum Historiae Pontificiae. 12: 55–90, especially 57-60. JSTOR23563638.