June 11 – Lombard Revolt: Mahmoud the Fat of Bari rises up against the Lombard rebels, led by Melus, and delivers the city to Basil Mesardonites, Byzantine governor (catepan) of the Catepanate of Italy. Melus is forced to flee to Salerno, and his brother-in-law Dattus escapes to Monte Cassino, but their families are taken captive, and carted off to Constantinople. Autumn – Basil Mesardonites visits Guaimar III of Salerno to secure his cooperation. Melus is forced to flee again. Basil proceeds to Monte Cassino – and persuades Abbot Atenulf to expel Dattus. Pope Sergius IV supports Dattus with papal troops, to garrison the tower on the Garigliano River, a fortified complex in the territory of the Duchy of Gaeta. King Henry II enfeoffs Adalbero with Carinthia (including the rule over the March of Verona) after the death of Duke Conrad I. The Grand Prince of Kyiv and ruler of Kievan Rus' Vladimir the Great laid the first foundations of Saint Sophia Cathedral, Kyiv.
June 11 – Lombard Revolt: Mahmoud the Fat of Bari rises up against the Lombard rebels, led by Melus, and delivers the city to Basil Mesar,donites, Byzantine governor (catepan) of the Catepanate of Italy. Melus is forced to flee to Salerno, and his brother-in-law Dattus escapes to Monte Cassino, but their families are taken captive, and carted off to Constantinople. Autumn – Basil Mesardonites visits Guaimar III of Salerno to secure his cooperation. Melus is forced to flee again. Basil proceeds to Monte Cassino – and persuades Abbot Atenulf to expel Dattus. Pope Sergius IV supports Dattus with papal troops, to garrison the tower on the Garigliano River, a fortified complex in the territory of the Duchy of Gaeta. King Henry II enfeoffs Adalbero with Carinthia (including the rul,e over the March of Verona) after the death of Duke Conrad I. The Grand Prince of Kyiv and ruler of Kievan Rus' Vladimir the Great laid the first foundations of Saint Sophia Cathedral, Kyiv.