Pope Gregory X
…which met at Lyons in June and July 1245. During this period, Visconti became acquainted with people such as Bonaventure, Thomas Aquinas, Gui Foucois, Pierre de Tarentaise and Matteo Rubeo Orsini, all of whom were participants in the council. Visconti was appointed Archdeacon of Heinault in the diocese of Liège on 9…