621, Calendar year.

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Year 621 (DCXXI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. The denomination 621 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 Byzantine Empire Emperor Heraclius concludes a peace agreement (in exchange for an annual tribute) with the Avars on the Balkan Peninsula, giving him a free hand to assemble Byzantine forces in Asia Minor, for non-military expenditure against the Persian Empire. The city of Málaga, in southern Spain in the province of Spania, is conquered by the Visigoths. Europe King Sisebut dies after a 9-year reign and is succeeded by his son Reccared II (just a child).
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