Duo Castella, commune (Dvigrad / Duecastelli)

Emperor Otto II confirms the jurisdictions of the bishops of Poreč and grants them immunities.

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 IV confirms the jurisdictions and immunities enjoyed by the Bishopric of Poreč.

Aquileian Patriarch and Istrian Margrave Wolfger confirms the temporal jurisdictions that the Church of Poreč enjoys by way of donations issued by previous patriarchs of Aquileia; 13^th-century forgery.

The catalogue of rights that the Patriarchate of Aquileia enjoys in the Margraviate of Istria.

The Commune of Dvigrad invites Hugh VIII of Duino and his lord, Duke Leopold of Habsburg, the captain and the lord of the neighboring County of Pazin, to become the guards (Lat. advocati) of the Commune and defend them against their enemies in return for their obedience and a yearly tribute of twelve Venetian marks.

The Venetian Senate deliberates on the matter of the four recently annexed communinites in Istria and their unhappiness with the current regimen; the first proposal (P. 1), to modify the existing jurisdictional framework is rejected; the second proposal (P. 2) is accepted, changing absolutely nothing, but only advising the rectors of Koper to delegate literate and suitable persons to these posts.

The Venetian Great Council creates a number of new administrative posts that are henceforth to be filled by the Venetian noblemen, among them the rector of Medulin, the podestà of Oprtalj, and the podestà of Dvigrad.

The Council of Ten confirms the old privilege of the Commune of Koper and the original pact with Dvigrad by which the nobles of Koper elect among themselves the regularly rotating podestà of Dvigrad.