Ravenna

Emperor Justinian I has Pope Vigilius I consecrate Maximian, a deacon from Pula, as the new bishop of Ravenna; once installed as bishop, Maximian embarks on several architectural projects, including the building of the Santa Maria Formosa church in Pula (narrative accounts from the Life of Saint Maximian written by Agnellus of Ravenna in his Book of the Pontiffs of the Church of Ravenna).

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).

Istria as described in the chapters of Cosmography, penned by the anonymous Ravenna Cosmographer (Anonymus Ravennas), including the region's rendition on the famous Peutinger's Map (Tabula Peutingeriana).

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.

Emperor Otto I donates Izola in Istria to the Venetian Vitale Candiano.

Emperor Otto III donates half of castrum Solkan and half of village Gorizia, together with half of the territories between Rivers Isonzo/Soča, Vipava/Vipacco, and the plateau of Trnovo, to the Church of Aquileia and its incumbent Patriarch John IV.

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.