800

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Year 800 (DCCC) was a leap year starting on Wednesday of the Julian calendar, the 800th year of the Common Era (CE) and Anno Domini (AD) designations, the 800th year of the 1st millennium, the 100th and last year of the 8th century, and the 1st year of the 800s decade. It was around this time that the Anno Domini calendar era became the prevalent method in Europe for naming years, so from this time on, the years began to be known as 800 and onwards.

Events

December 25 – Charlemagne, king of the Franks, is crowned Holy Roman Emperor by Pope Leo III as Charles I, with the title "Emperor of the Romans". The coronation takes place during Mass at the Basilica of St. Peter in Rome, on Christmas Day. The Frankish Empire is formed in Western Europe, which is not recognized by Empress Irene at Constantinople. This triggers a series of disputes with the Byzantines around who is officially ruling the former Western Roman Empire.^[1]
The Rus' Khaganate is created by people who are called Rus', after the 182-year dominance of the Khazars. This is the starting period of the rise of the Kievan Rus', and the later states of Russia, Belarus and Ukraine (approximate date).
King Eardwulf of Northumbria has his men seize Prince Ealhmund, son of the late King Alhred, and put him to death. He is buried at Derby in St. Alkmund's Church, and later revered as a saint (approximate date).
The Abbasid Caliphate is forced to cede their holdings in southern Italy to the Aghlabid Dynasty.

The ci, a new type of lyric poetry with irregular lines, is set to a melody during the Tang Dynasty (approximate date).

Sijilmasa (in present-day Morocco) is founded as the departure point for caravans between North Africa and the western Sudan (approximate date).
Ife, in present-day Nigeria, becomes an important urban center (approximate date).
The Abbasid Caliphate is forced to cede Ifriqiya (present-day north-eastern Algeria, Tunisia and western Libya) to the Aghlabid Dynasty.

June 28 – Ochk'in Kaloomte' Aj Ho' Baak becomes the new ruler of the Mayan city state of Machaquila in Guatemala and reigns until his death in 815.
Itza culture starts in Mesoamerica (840).

Archbishop Hygeberht of Lichfield retires; he is succeeded by Ealdwulf. King Coenwulf of Mercia is on better terms with the archbishopric of Canterbury than his predecessor, and unsuccessfully attempts to have the Mercian archiepiscopal see transferred to London (approximate date).
The Book of Kells is written and illuminated in a Columban monastery, in Ireland (approximate date).

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