Maximian, the bishop of Ravenna, endows the monastery of St. Andrew and the church of St. Mary in Pula.
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).
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.
King Berengar I donates two forts, the Vermes (Beram in Istria ?), to the Bishopric of Trieste (10th- or 11th-century forgery).
King Hugo donates Sipar, Umag, and Monfalcone to Radald, the bishop of Trieste, and places the Bishopric of Trieste under his royal protection; a forged charter.
A public placitum held in front of Istrian Count Werihen whereby the dispute between the Bishopric of Poreč, represented by Bishop Andrew, and a Bertha, a widow of a Cadoloh, regarding the latter's fiscal obligations towards the Church of Poreč (herbaticum and glandaticum) is judged in Bertha's favor.
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 IV, King of the Romans, donates imperial rights over the Bishopric of Trieste, including the right to appoint and invest its bishops, to the Patriarchate of Aquileia and its Patriarch Henry.
Henry IV, King of the Romans, explains the reasoning behind the donation of regalian rights over the Bishopric of Trieste to the Patriarchate of Aquileia and confirms the said donation.
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.
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.
Patriarch Berthold V of Andechs and Count Maynard III of Gorizia elect arbitrators to arbitrate their disputes.
Settlement of dispute between the Patriarch Bertold V and Count Maynard III of Gorizia by way of the arbitrational sentence promulgated by arbiters Bernard of Strassold and Clizo of Mels. Among other things, the Gorizian is forced to relinquish everything he had usurped in Istria.
Aquileian Patriarch Raymond della Torre and Count Albert I of Gorizia enter into a military alliance directed against Venice.
The elected arbitrators and envoys deliberate over the dispute between the Commune of Venice and the Patriarchate of Aquileia regarding the jurisdiction over Istrian communes recognizing Venetian authority, reaching absolutely no conclusion after six sessions.