King Theodoric orders Anthony, the bishop of Pula, to restitute the rustic possession violently occupied by the bishop's officials to a certain Stephan.
Maximian, the bishop of Ravenna, endows the monastery of St. Andrew and the church of St. Mary in Pula.
A poem composed by Venantius Fortunatus to a Vitalis, a bishop of Ravenna, traditionally identified as Maximian of Ravenna, but also as bishop Vitalis of Milan, bishop Vitalis of Altino, or even an eponymous, otherwise undocumented bishop of Pula.
Venantius Fortunatus composes a poem in celebration of the construction of the church of St. Andrew, built by a Vitalis, the bishop of Ravenna (most probably a laudatory nickname for Bishop Maximian).
The acts of the synod of Grado, heavily interpolated by later falsifications, by which the bishops of the ecclesiastical province of Aquileia remain faithful to the Catholic creed as decreed by the Ecumenical Councils of Chalcedon (451), Ephesus (431), Constantinople I (381) and Nicaea (325), refusing to denounce the Three Chapters condemned by the Second Ecumenical Council of Constantinople (552).
Pope Gregory II writes to the bishops and populace of Venice and Istria, notifying them that Peter, the former bishop of Pula who usurped the Patriarchate of Grado following the death of Patriarch Donato, has been removed and returned to his See in Pula and that the bishops ought to elect a new head of the church of Grado.
Pope Leo III writes to Emperor Charlemagne regarding the situation of Fortunatus, the patriarch of Grado who had been exiled from his see by the Venetians and "the Greeks". The pope agrees that the Church of Pula should be bestowed upon Patriarch Fortunatus as his new seat.
The decrees of the Synod of Mantua: the long conflict between the patriarchs of Grado and Aquileia over the metropolitan jurisdiction over Istrian bishoprics is settled in favor of the Aquileian Church.
Pope Sergius III writes to John, the bishop of Pula, informing him of Archbishop of Ravenna John XI's complaints against Count Albuin, who unlawfully alienated the possessions of the Church of Ravenna in Istria, and asking him to personally convey to the Count that he must return these possessions under the threat of excommunication and that King Berengar I will not be crowned emperor until he grants Albuin’s March (of Istria or of Friuli) to someone better.
Archbishop John XI of Ravenna writes to Bishop John of Pula regarding the pope's admonition of Count Albuin who had alienated some goods of the Ravennite Church in Istria.
Following a dispute between the Venetians and Istrians, one that resulted in the embargo on all trading between Istria and Venice, Margrave Winther, together with the people and the bishops of Istria, promise to cease all hostilities towards the Venetians, not to usurp or occupy the properties of the Patriarchate of Grado or Venetian bishoprics in the region, to regularly take cognizance of and adjudicate the complaints lodged by the Venetians against defaulting debtors from Istria, to abolish all the newly instituted duties and only charge the customary fees of a docking tax and a market fee, and to promptly inform the Venetians in case the king of Italy plans any offensive against them so that they could safely repatriate.
Venetian Doge Pietro II Orseolo departs with his navy on a military expedition against Croats and Narantines in Dalmatia; on his journey, the doge stops at Poreč and Pula where he is cordially greeted by the bishops, clergy, and citizens of these Istrian cities (narrative account from John the Deacon’s Istoria Veneticorum).
Engelmar, the bishop of Poreč, donates the monastery of Saint Cassian in Poreč to the monastery of Archangel Michael in Pula.
Megingaudus, the bishop of Pula, donates a property to St. Michael's monastery, witnessed by "Istrian margrave Ulrich".
King Henry IV donates regalian rights over the Bishopric of Pula, namely the right to appoint and invest bishops, to the Patriarchate of Aquileia.
Siegried and Heliza, the noble citizens of Poreč, donate their possessions, a church dedicated to St. Peter in Poreč with all its dependencies and an allod called Mount Petrosus, to St. Michael’s monastery in Pula.
Pope Innocent II confirms the rights and privileges of the incumbent Aquileian patriarch: the metropolitan jurisdiction over sixteen bishoprics, including all the disputed Istrian dioceses, and seven monasteries, grants him the pallium, and corroborates all the possessions and titles of the Aquileian Church, including the "County, the March, the Duchy," the regalian rights and imperial privileges.
Five Istrian communities – Pula, Rovinj, Poreč, Novigrad and Umag – pledge their fealty to the doge of Venice and his successors, promising military support, a variety of symbolic tributes to St. Mark, the patron saint of Venice, and to the doges, guaranteeing the safety of all the Venetians in their jurisdictions and abolishing all the dues for Venetian traders.
The people and the clergy of Pula agree to a final settlement with Venice whereby they fully acknowledge their fault for the military actions directed against them and renounce all their claims for further recompense and restitutions.
Pope Alexander III confirms the metropolitan jurisdictions of the incumbent Aquileian patriarch, institutes a new suffragan bishopric in Koper, grants him the pallium, and corroborates all the possessions and titles of the Aquileian Church, including the "County, the March, the Duchy," the regalian rights and imperial privileges.
Emperor Frederick I Barbarossa confirms the rights and jurisdictions of the Patriarchate of Aquileia and assumes this church under imperial protection, confirming all the previous donations issued to the patriarchs by his predecessors kings and empires, by the popes, and by other laymen.
The incumbent patriarchs of Grado and Aquileia, Enrico Dandolo and Ulrich of Treffen respectively, solemnly end the centuries-old conflict between the two churches regarding the metropolitan jurisdictions over the Istrian bishoprics: the patriarch of Grado renounces the metropolitan pretensions of his church, the treasury that Patriarch Poppo took from Grado, and the possessions in Marsano, Aquileia, Zèmole and Marano Lagunare, but receives the spiritual jurisdiction over the parishes Latisana and San Fior, together with the quarter of the tithes and the annual income of up to seventy pounds of Veronese coins.
In the name of the community of Prnjani, Stepizus subjects his village to the podestà and the Commune of Pula under the same conditions and promising the same oath as the villagers of Barban.
Monfiorito of Pula pledges loyalty to the Aquileian Patriarch Gregory of Montelongo, promising to uphold the rights and honor of his Church, to reimburse all goods received from the patriarch and his people, to immediately and unconditionally withdraw from Motovun, and to appoint suitable sureties for the fulfillment of these commitments in form of sworn guarantors. This oath is subsequently reaffirmed in Muggia as Monfiorito, along with the representatives of the Commune of Pula, provides thirty-one persons as his sworn guarantors.