King Otto IV holds an imperial diet in Augsburg where he deals, among many other things, with the fate of the condemned murderers of King Philip and the Margraviate of Istria (notices from contemporary narrative accounts, Otto of St. Blasien’s and Conrad of Scheyern’s chronicles).
Otto IV, King of the Romans, confirms the rights of the Patriarchate of Aquileia over the Duchy of Friuli, including the incomes from the administration of criminal justice, and all documented agreements made between Patriarch Peregrine I and Count Maynard I of Gorizia as well as Patriarch Ulrich II and Count Engelbert II of Gorizia regarding advocacy and other matters.
Otto announces to all the subjects of the Empire in Italy that he has appointed Patriarch Wolfger of Aquileia imperial legate for Lombardy, Tuscia, the Duchy of Spoleto and the Marches of Ancona and Romaniola, commanding them to receive him honorably and to recognize his decisions in imperial affairs.
King Otto IV invests Patriarch Wolfger with imperial regalian rights and attests that his successors do not need to journey to German lands to receive the regalian investiture because the patriarchs of Aquileia are one of the Italian ecclesiastical princes.
On the behest of Wolfger, the patriarch of Aquileia, and other princes gathered at the Diet of Augsburg, King Otto IV accepts the resignation of the Margraviate of Istria from Duke Ludwig of Bavaria and donates the same Margraviate to Patriarch Wolfger and the Church of Aquileia.
Henry of Andechs-Merania, the margrave of Istria, donates a property of his to the monastery of Saint Lawrence in Wilten (Innsbruck), for the salvation of his soul and the souls of his parents.
Henry of Andechs-Merania, the margrave of Istria, donates properties to the monastery of Saint Mary and Saint Hermagoras in Obernbug for the salvation of his soul.
Otto IV, Emperor of the Holy Roman Empire, confirms the donation of the Margraviate of Istria to the Patriarchate of Aquileia.
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; 13th-century forgery.
Answering the pleas of Aquileian Patriarch Berthold, Emperor Frederick II proclaims and ratifies the verdict of the imperial princes gathered at the Diet of Ravenna, confirming the secular rights and prerogatives of Aquileian patriarchs and forbidding the election of rectors and the exercise of regalian rights to the subjected urban communities, especially to the Istrian cities of Koper, Poreč, and Pula.
In the name of Patriarch-margrave Berthold V of Andechs, John de Riva, the general gastald in Istria, orders a Nicholas de Roço of Poreč and all his supporters to present themselves in front of the patriarch in Friuli and to respond to allegations raised against them by a Marino de Mengoso of Poreč and his supporters.
In the name of Patriarch-margrave Berthold V of Andechs, John de Riva, the general gastald in Istria, orders a Marino de Mengoso of Poreč and all his supporters to present themselves in front of the patriarch in Friuli and to respond to allegations raised against them by a Nicholas de Roço of Poreč of Poreč and his supporters.
Answering the pleas of Aquileian Patriarch Berthold V, Emperor Frederick II decrees that throughout Friuli and Istria criminal justice administration and everything else pertaining to corporal punishments and coercion (merum et mixtum imperium) resides exclusively with the patriarch of Aquileia, threatening to deprive of their fiefs anyone who would dare to administer criminal justice on patriarchal territories.
Emperor Frederick II confirms the treaty signed between Aquileian Patriarch Berthold V and the Commune of Koper.
Count Maynard III of Gorizia promulgates an arbitrational sentence in a dispute between Aquileian Patriarch Berthold V and the Commune of Koper regarding the elections of podestàs, the prerogatives of the appointed gastalds and the administration of criminal justice, fines above a hundred bezants and the patriarch’s right to emend the local statute.
On his way from German lands to Apulia, the new king of the Romans, Conrad IV, travels through Istria (narrative account from the anonymous continuator of Genoese Annals).
Roman king Conrad IV orders Berthold, the margrave of Vohburg-Hohenburg, to explain to the podestà of Koper, Andrea Zeno, and to the Capodistrians under his authority, how the Margraviate of Istria is an imperial land bestowed unto the late Aquileian Patriarch Berthold V of Andechs by the king’s father (Emperor Frederick II), but now, with the patriarch’s death, the Empire can again freely dispose with the Margraviate and therefore, the citizens of Koper should not swear any fealty to the newly elected Aquileian Patriarch Gregory of Montelongo, but persevere in their allegiance to the Empire.
Roman King Conrad IV accords privileges of the free elections of podestàs to the Commune of Koper, as long as they are elected from among those faithful to the Empire.
Roman King Conrad IV issued a privilege to the Commune of Poreč, granting it the right of free election of their podestas, recognizing the city’s regalian rights and the jurisdictions over its district, allowing the imperial notaries to freely exercise their trade in the city and its district, granting it the right to retain the incomes from tolls levied on commercial goods entering the city by land, and giving it the permission to lawfully and securely trade with the Kingdom of Sicily.
Aquileian Patriarch and Margrave of Istria and Carniola Gregory of Montelongo invests Henry of Pazin and his heirs, represented by Cono of Momjan, with several fiefs which included Lupoglav and the adjacent village Gorenja Vas in Istria.
Asquin the dean and the chapter of Aquileia together with Hartwig of Castellerio the deputy, all acting on behalf of the Patriarchate of Aquileia during the sede vacante period, accord a privilege to the Commune of Buzet as a reward for their loyalty and steadfastness during the past war, exempting them from an annual tax in money that they had customarily paid to the Church of Aquileia.
The Commune of Koper authorizes ten of its citizens to represent the Commune in reaching a peace treaty between the patriarch of Aquileia and the count of Gorizia.
A peace treaty is reached between Aquileian Patriarch Raymond della Torre and his advocate Albert, Count of Gorizia, together with his allies which included the Commune of Koper and Piran.
With the help of Fulcher, the bishop of Concordia, a peace treaty is reached, signed between Venice on the one side and the Patriarchate of Aquileia, the count of Gorizia, and the Commune of Trieste on the other, ending the war that had begun in 1283.
Venice signs a peace treaty with the patriarch of Aquileia, Count Albert I of Gorizia, and the Commune of Trieste, ending their final conflict and restoring amicable relations as defined by their previous pacts; Venice retains the jurisdictions over the subjected communities in Istria with the exception of Muggia, Buje, and Dvigrad; the settlement of the dispute over the jurisdictions in Istria between Venice and the Patriarchate of Aquileia is entrusted to Pope Nicholas IV.