799

799 in various calendars
Gregorian calendar	799; DCCXCIX
Ab urbe condita	1552
Armenian calendar	248; ԹՎ ՄԽԸ
Assyrian calendar	5549
Balinese saka calendar	720–721
Bengali calendar	206
Berber calendar	1749
Buddhist calendar	1343
Burmese calendar	161
Byzantine calendar	6307–6308
Chinese calendar	戊寅年 (Earth Tiger); 3496 or 3289; — to —; 己卯年 (Earth Rabbit); 3497 or 3290
Coptic calendar	515–516
Discordian calendar	1965
Ethiopian calendar	791–792
Hebrew calendar	4559–4560
Hindu calendars
- Vikram Samvat	855–856
- Shaka Samvat	720–721
- Kali Yuga	3899–3900
Holocene calendar	10799
Iranian calendar	177–178
Islamic calendar	182–183
Japanese calendar	Enryaku 18; (延暦１８年)
Javanese calendar	694–695
Julian calendar	799; DCCXCIX
Korean calendar	3132
Minguo calendar	1113 before ROC; 民前1113年
Nanakshahi calendar	−669
Seleucid era	1110/1111 AG
Thai solar calendar	1341–1342
Tibetan calendar	阳土虎年; (male Earth-Tiger); 925 or 544 or −228; — to —; 阴土兔年; (female Earth-Rabbit); 926 or 545 or −227

Millennium:	1st millennium
Centuries:	7th century; 8th century ; 9th century;
Decades:	770s; 780s; 790s ; 800s; 810s;
Years:	796; 797; 798; 799 ; 800; 801; 802;

Year 799 (DCCXCIX) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 799 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

Autumn – Siege of Trsat: Višeslav, prince or duke of Dalmatian Croatia, decisively defeats an invading Frankish army under Eric of Friuli, during the siege at the fortress city of Trsat (Rijeka).

King Eardwulf of Northumbria, worried about further rivals, has ealdorman Moll killed. Former king Osbald dies as an abbot in exile. He is buried in an unmarked grave in York Minster.

April 25 – Pope Leo III is physically attacked by a band of aristocratic conspirators, under the leadership of a public official who is a nephew of the late Pope Adrian I. After mistreatment and attempted disfigurement by the citizens of Rome, Leo flees to the court of King Charlemagne at Paderborn (modern Germany) to seek protection. He sends him back with Frankish agents, and restores him to the papal throne.