Vol. 3: A 1077 usque ad 1209

Holy Roman Emperor Henry IV donates the County of Istria to the Patriarchate of Aquileia.

Aquileian Patriarch Henry pledges his oath of fealty to Pope Gregory VII.

Pope Gregory VII admonishes a noble knight Wezelin for attacking Dalmatia, ruled by a ruler approved by the Holy See, and orders him to immediately stop with the hostilities lest the "sword of St. Peter" be unleashed upon him and his followers.

Henry IV, King of the Romans, donates imperial rights over the Bishopric of Poreč, including the right to appoint and invest its bishops, to the Patriarchate of Aquileia and its patriarch Henry. 

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 imperial rights over the Bishopric of Trieste to the Patriarchate of Aquileia and confirms the said donation.

Two regesta of Henry IV's donation of imperial rights over the Bishopric of Pula, namely the right to appoint and invest bishops, to the Patriarchate of Aquileia. Original document is lost and no in extenso copies have thus far been found.

Henry IV, emperor of the Romans, donates the March of Carniola to the Patriarchate of Aquileia and its patriarch Ulrich I. 

Pope Alexander III confirms the spiritual and secular jurisdictions of the bishops of Poreč.

Adalbert, the count of Istria, pronounces a sentence regarding the jurisdictions over the territories of Gradina (Calisedo) claimed by both the commune of Sv. Lovreč and the heirs of Adalburn, vassals of Gerold of Pula, the lord of Gradina.

Engelbert III, the count of Gorizia, solemnly promises to Peter, the bishop of Poreč, that both he and his vassals will faithfully serve and guard the rights and possessions of his Church.

Wolfger, the patriarch of Aquileia and margrave of Istria, confirms the boundaries of the territories under the jurisdictions of the bishops of Poreč. A Forgery drawn up by the chancery of Boniface, the bishop of Poreč (1282 - 1305).