817

817 in various
AG
Thai solar calendar	1359–1360
Tibetan calendar	阳火猴年; (male Fire-Monkey); 943 or 562 or −210; — to —; 阴火鸡年; (female Fire-Rooster); 944 or 563 or −209

Millennium:	1st millennium
Centuries:	8th century; 9th century ; 10th century;
Decades:	790s; 800s; 810s ; 820s; 830s;
Years:	814; 815; 816; 817 ; 818; 819; 820;

Year 817 (DCCCXVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events

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 (including German and Gallic parts). Pepin, the second son, is proclaimed king of Aquitaine, and receives Gascony (including the marche around Toulouse and parts of Septimania); Louis (the youngest son) 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.^[1] He is succeeded by Sico as ruler of Benevento (Southern Italy), who is forced to pay an annual tribute of 7,000 solidi to Louis I.

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.

Millennium:	1st millennium
Centuries:	8th century 9th century 10th century
Decades:	790s 800s 810s 820s 830s
Years:	814 815 816 817 818 819 820