 The most famous of these confrontations, however, came at the end of the Cardinal's life.From 9 September 1561 to 9 October 1561 Cardinal François de Tournon was one of six cardinals, including the Papal Legate Cardinal Ippolito d'Este, who attended the Colloquy of Poissy, which had been summoned by Queen Mother Catherine de' Medici and her Chancellor Michel de l'Hôpital in an attempt to bring about a reconciliation between Catholics and Calvinists (Huguenots) in France.At the First Session, however, when Theodore Beza, John Calvin's French disciple, was explaining the Calvinist view of the Eucharist, Cardinal de Tournon could not contain himself and launched into a denunciation of Beza's heresies.