Guy of Lusignan
In 1189 he participated in the Third Crusade, as papal legate accompanied by William I of Cagliari, reaching the Holy Land with 52 ships and sided with Guy of Lusignan, only to take the side of his rival Conrad of Monferrat; in the convulsive phases of the siege of Acre, he sanctioned the divorce between Humphrey IV of Toron and Queen Isabella of Jerusalem, so that she could marry Conrad.