Jean du Vergier de Hauranne

Jean du Vergier de Hauranne, the Abbé (Abbot) of Saint-Cyran, (1581 – 6 October 1643) was a French Catholic priest who introduced Jansenism into France.

The duo spent 1611–1614 there, in seclusion in a house belonging to his family, where they studied the Church Fathers together, with a special focus on the thought of Augustine of Hippo, until Jansen left Bayonne in 1614 to return to the Dutch Republic.

[1] In 1617 Vergier left Bayonne at the invitation of Henri-Louis Chasteigner de La Roche-Posay, the Bishop of Poitiers, where he soon became a leading figure of the diocese.

After the death of his friend Bérulle in 1629, Vergier became the leader of a group of devotees, allied with the Parlement of Paris, which brought him into conflict with the French Prime Minister, Cardinal Richelieu.

He himself died shortly after in Paris in 1643, having lived long enough to hear of the condemnation of Jansen's teachings by Pope Urban VIII the previous year.