 The princely assembly, that chronicler Ekkehard of Aura called a gathering of "many "heads of the state" (tot capita rei publicae)" met on September 29, 1121 in Würzburg and forced the emperor to finally reconcile with the pope.Thus, on September 23, 1122 the so-called Concordat of Worms came about.Calixt II, was represented by Cardinal Lambert, Bishop of Ostia.