Vol. 2: A 804 usque ad 1077

Pope Sergius IV confirms the jurisdictions of the bishops of Poreč over Rovinj, Dvigrad, and Bale that were disputed by the Aquileian patriarch John.

King Henry II donates castle Bled and thirty royal mansi in the March of Carniola to the Bishopric of Bressanone.

King Henry II confirms Otto III’s donations of Pazin and Pićan to the Church of Aquileia and donates various jurisdictions in these two places, terrains to both sides of the river Raša, and the port of Plomin.

As Venetian Doge Otto Orseolo and his brother Urso, the patriarch of Grado, are banished from Venice and find shelter in Istria, Poppo, the patriarch of Aquileia, uses the opportunity and military invades Grado, snatching away numerous relics and the patriarchal treasury; the Venetians soon strike back and retake Grado, expelling the Aquileian forces (narrative accounts from three different chronicles).

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.

Pope John XIX confirms the possessions of the Patriarchate of Grado.

Pope John XIX and Emperor Conrad II convene a synod in Rome whereby the decrees of the Synod of Mantua from 827 are confirmed and the patriarch of Aquileia is once again proclaimed the sole metropolitan head of the ecclesiastical province of Aquileia with Grado being a mere parish subjected to his metropolitan and diocesan authority.

The ruling of the royal court, chaired by Emperor Conrad II and his son Henry in San Zeno in Verona, by which the duke of Carinthia, Adalbero of Eppenstein, is forced to renounce his claims to exact fodrum - a levy in kind for the upkeep of the royal retinue during the king's stay in Italy - from the subjects of the Church of Aquileia. By official decree of the imperial court, the Church of Aquileia is to be free from this levy to the dukes of Carinthia.

Pope John XIX confirms the jurisdictions and possessions of the Church of Aquileia, including the "parish of Grado" as per the conclusions of the Synod of Rome that took place five months earlier, and bestows the pallium upon the incumbent patriarch.

Emperor Conrad II bestows upon Aquileian Patriarch Poppo the right to mint coins that ought to be of equal or greater value than the Veronese denars.

Engelmar, the bishop of Poreč, donates the monastery of Saint Cassian in Poreč to the monastery of Archangel Michael in Pula.

Emperor Conrad II confirms the decisions of the Synod of Rome from 1027 regarding Aquileian jurisdiction over Grado, invests the patriarchs of Aquileia with the possession of “the parish of Grado”, and donates Venetian territories between the rivers Piave and Livenza to the Patriarchate of Aquileia.

Upon the petition of the citizens of Koper, who suffered due to their allegiance to the Empire, Emperor Conrad II confirms their possessions, their customary law, immunities, and the freedom to trade in the Empire.

Eberhard II of Sempt-Ebersberg founds the monastery in Geisenfeld. Forgery from the late 15th or early 16th century.

Emperor Conrad II donates Lovrečica to the Bishopric of Novigrad.

Emperor Conrad II donates Umag to the Bishopric of Novigrad as both an ecclesiastical and temporal possession; 16th-century forgery.

Henry III, King of the Romans, confirms the donations of his predecessors to the Bishopric of Trieste as well as all the immunities and privileges enjoyed by the said Church, including the jurisdiction over Umag and Monfalcone.

Henry III, King of the Romans, donates properties in the March of Carniola and the County of Margrave Eberhard to the Church of Aquileia.

Azica, the daughter of Count Wezelin and Countess Williburga, donates properties to the monastery of Saint Mary and Archangel Michael in Lim Bay (14th-century forgery).

Countess Williburga, the mother of Azica, confirms her daughters donation and donates even more properties to the monastery of Saint Mary and Saint Michael in Lim. 15th century forgery.

The decision of Henry III's royal court regarding the tithes from the territories of Saint Michael's monastery in Lim bay. 15th century forgery.

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.

Notices from the cartularies of the Ebersberg and Geisenfeld monasteries regarding the heirs of the house Sempt-Ebersberg: Williburga II, her daughter Hademoud II, and her grandson Ulrich I.

Pope Leo IX bestows the pallium onto Domenico Marango, the patriarch of Grado.

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.