The Synod of Worms called by Henry IV is held on January 24, 1076, resulting in Henry and the German Bishops, condemning Pope Gregory VII and asking for his resignation.
Gregory VII responded in February 1076 at his Lenten Synod in Rome by excommunicating Henry IV, suspending him from the kingship, and releasing his subjects from their oaths of allegiance. This conflict escalated the Investiture Controversy—a major power struggle between church and state—and forced Henry IV to later beg for forgiveness at Canossa (1077).
