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Year 268 (CCLXVIII) was a leap year starting on Wednesday of the Julian calendar. At the time, it was known in Rome as the Year of the Consulship of Paternus and Egnatius (or, less frequently, the year 1021 Ab urbe condita). The denomination 268 for this year has been used since the early medieval period when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

= By place =

== Roman Empire ==

September – Battle of Naissus: Emperor Gallienus, aided by Aurelian, defeats a Gothic coalition (50,000 warriors) near Naissus (Niš, modern Serbia).
Gallienus is killed by his senior officers at Mediolanum (Milan) while besieging his rival Aureolus. Aureolus is murdered in turn by the Praetorian guard.
Marcus Aurelius Claudius, who may have murdered Gallienus, becomes the new emperor of Rome and will reign as Claudius II.
Claudius II asks the Senate to spare the lives of Gallienus's family and political supporters. Emperor Gallienus is deified and buried in a family tomb on the Appian Way.
The Alamanni invade Italy north of the Po River.
The Visigoths first appear as distinct people.
November – Battle of Lake Benacus: A Roman army (35,000 men) under emperor Claudius II defeats the Germanic tribes of the Alamanni along the banks of Lake Garda.

== Europe ==

Victorinus is declared emperor of the Gallic Empire by the legions at Augusta Treverorum (Trier), following the murders of his predecessors. He is recognized by the provinces of Gaul and Britain, but Hispania might have reunited with the Roman Empire.

= By Topic =

== Religion ==

December 26 – Pope Dionysius dies in Rome after a 9-year reign{{cite web |title=Saint Dionysius {{!}} pope |url=https://www.britannica.com/biography/Saint-Dionysius |website=Encyclopedia Britannica |access-date=5 January 2020 |language=en}} and is succeeded by Felix I.{{cite book |last1=Wise |first1=Leonard F. |last2=Hansen |first2=Mark Hillary |last3=Egan |first3=E. W. |title=Kings, Rulers, and Statesmen |date=2005 |publisher=Sterling Publishing Company, Inc. |isbn=978-1-4027-2592-0 |page=142 |url=https://books.google.com/books?id=PEsM1ibpcJQC&pg=PA142 |language=en}}

Births

Deaths

December 26 – Dionysius, bishop of Rome
Aureolus, Roman usurper
Gallienus, Roman emperor (b. 218){{cite book |last1=Ermatinger |first1=James W. |title=The Roman Empire: A Historical Encyclopedia [2 volumes] |date=2018 |publisher=ABC-CLIO |isbn=978-1-4408-3809-5 |page=245 |url=https://books.google.com/books?id=onlUDwAAQBAJ&pg=PA245 |language=en}}
Laelianus, Roman usurper
Marcus Aurelius Marius, Roman emperor (Gaul)
Postumus, Roman emperor of the Gallic Empire

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