Gregorian Reform
Under pressure, the Salian king allied with the German episcopacy, benefitting from their hostile stance on the Gregorian Reform and a centralisation of church authority. Of the 38 German bishops, 24 attended. Led by the "primas Germaniae", Archbishop Siegfried of Mainz, Henry's supporters included Bishop Adalbero of Würzburg and Bishop William of Utrecht, as well as the Liège bishop Henri de Verdun. Cardinal Hugh of Remiremont, who had already cut ties with the Pope, spoke damningly against Gregory. On the other hand, Archbishop Gebhard of Salzburg, a supporter of Gregory like Bishop Altmann of Passau, stayed away.