Original: September 20 & ndash; Unhappy with Pope Urban's critical attitude towards them, the majority of the cardinals meet at Fondi and elect Clement VII as antipope and establish a rival papal court at Avignon.
Simplified: September 20 - Unhappy with Pope Urbans critical attitude towards them, the majority of the cardinals meet at Fondi and elect Clement VII as antipope and establish a rival papal court at Avignon.