Holders of this title supported the Pataria Movement and its leaders like Arialdo and Erlembald. The Crescentii family competed for influence over holders of this title against nobles who guaranteed holders of this title territorial authority in the Ottonianum. In the 17th century, David Blondel disproved the veracity of a set of texts attributed to holders of this title by Pseudo-Isidore. Jean de Mailly recounted how a holder of this title (*) gave birth while mounting a horse, thus revealing her sex. A holder of this title accepted territory in the Exarchate of Ravenna that had been seized by the (10[1])Lombards in the Donation of Pepin. Michael I (“the first”) Cerularius opposed a holder of this title named Leo IX during the Great Schism. For 10 points, name this title held by the head (10[1])of the Catholic Church. ■END■