Санта-Прасседе
Pileo di Prato was named a cardinal by Urban VI on 18 September 1378, and assigned the church of Santa Prassede as his titular church. His first duty was to write a letter to the King of France, explaining the election of Urban, and arguing for its canonical validity. Writing from Venice on 15 December 1378, he also posted a lengthy letter to Count Louis of Flanders.