it was in this same year that emperor henry iv began his open conflict with gregory. at the synod of worms in january 1076, a resolution was adopted deposing gregory, and in this decision the pro-imperial bishops of transpadine italy joined. among these must have been guibert, for he shared in the sentence of excommunication and interdiction which gregory vii pronounced against the guilty transpadine bishops at the lenten synod of 1076.