Pope Gregory III writes to archbishop Anthony of Grado and to his suffragans, inviting them to the church synod to be held in Rome in the coming November where the issue of icon veneration will be discussed.
Acts of the 731 Synod of Rome whereby the division between the Patriarchate of Grado and the “Bishopric of Friuli” (Patriarchate of Aquileia) is sanctioned, officially confirming Grado as “New Aquileia” and the metropolitan see of the entire ecclesiastical province of Venetia et Histria; 11th-century forgery.
Pope Gregory III orders Callistus, the patriarch of Aquileia who has received the pallium from the pope, to restitute Centenara and Musione, the possessions of the monastery of St. Mary in Barbana subject to the Patriarchate of Grado.
Pope Gregory III writes to Patriarch Anthony of Grado, inviting him and his suffragans to a synod that is to take place in Rome and assuring him of safe passage through Lombard lands.
At the Synod of Rome, convened in order to settle the conflict between the patriarchs of Aquileia and Grado, Pope John XIX condemns Patriarch Poppo’s invasion of Grado, revokes his earlier privilege according to which he was given ecclesiastical jurisdiction over the “island of Grado”, and confirms the metropolitan status of the Patriarchate of Grado.
Following the Synod of Rome, convened to resolve the recently rekindled conflict between the patriarchs of Aquileia and Grado, Pope Benedict IX writes to Urso, the patriarch of Grado, informing him of the Synod’s decision to support the cause of his church against the Aquileian Patriarch Poppo, who had recently launched a second military invasion of Grado before his untimely death; the pope confirms the metropolitan status together with the ecclesiastical and secular jurisdictions of the Patriarchate of Grado, dubbed “New Aquileia” for the very first time in an authentic papal document.
Pope Leo IX writes to Venetian and Istrian bishops, directing them to acknowledge the metropolitan rights of the Patriarch of Grado, whose primacy and metropolitan jurisdictions were confirmed by the recently convened Synod of Rome and the Apostolic See.