817

By place

Europe

• Summer - Emperor Louis I issues an Ordinatio Imperii, an imperial decree that lays out plans for an orderly succession. He divides the Frankish Empire among his three sons: Lothair, the eldest, is proclaimed co-emperor in Aachen, and becomes the overlord of his brothers. He receives the dominion of Burgundy. Pepin, the second son, is proclaimed king of Aquitaine, and receives Gascony ; Louis is proclaimed king of Bavaria, and receives the dominions of East Francia.
• Prince Grimoald IV is assassinated by a complot of Lombard nobles vying for his throne. He is succeeded by Sico as ruler of Benevento, who is forced to pay an annual tribute of 7,000 solidi to Louis I.

  North Africa

• Ziyadat Allah I becomes the third Aghlabid emir of Ifriqiya. During his rule, the relationship between the Aghlabid Dynasty and the Arab troops remains strained.

  By topic

Religion

• January 24 - Pope Stephen IV dies at Rome after a 7-month reign, and is succeeded by Paschal I as the 98th pope of the Catholic Church.
• Synod of Aachen: The council adopts a capitulare monasticum, containing the Benedictine rules of monastic life in the Frankish realm.