Besides Cornelius Jansenius, the French priest and theologian Antoine Arnauld was the second founding figure of Jansenism. He taught at the Sorbonne from 1643, which he was forced to leave in 1656 for his religious convictions. Arnauld retired until 1668 and fled to the Spanish Netherlands in 1679. He died an emigrant in Brussels.
Portrait of Antoine Arnauld (1612–1694), engraving by Pierre Drevet (1663–1738) after Jean Baptiste de Champaigne (1631–1681), 407x310 mm, 1696; source: © Trustees of the British Museum.