803

803 in various calendars
Gregorian calendar	803; DCCCIII
Ab urbe condita	1556
Armenian calendar	252; ԹՎ ՄԾԲ
Assyrian calendar	5553
Balinese saka calendar	724–725
Bengali calendar	210
Berber calendar	1753
Buddhist calendar	1347
Burmese calendar	165
Byzantine calendar	6311–6312
Chinese calendar	壬午年 (Water Horse); 3500 or 3293; — to —; 癸未年 (Water Goat); 3501 or 3294
Coptic calendar	519–520
Discordian calendar	1969
Ethiopian calendar	795–796
Hebrew calendar	4563–4564
Hindu calendars
- Vikram Samvat	859–860
- Shaka Samvat	724–725
- Kali Yuga	3903–3904
Holocene calendar	10803
Iranian calendar	181–182
Islamic calendar	187–188
Japanese calendar	Enryaku 22; (延暦２２年)
Javanese calendar	698–699
Julian calendar	803; DCCCIII
Korean calendar	3136
Minguo calendar	1109 before ROC; 民前1109年
Nanakshahi calendar	−665
Seleucid era	1114/1115 AG
Thai solar calendar	1345–1346
Tibetan calendar	阳水马年; (male Water-Horse); 929 or 548 or −224; — to —; 阴水羊年; (female Water-Goat); 930 or 549 or −223

Millennium:	1st millennium
Centuries:	8th century; 9th century ; 10th century;
Decades:	780s; 790s; 800s ; 810s; 820s;
Years:	800; 801; 802; 803 ; 804; 805; 806;

Year 803 (DCCCIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar.

Events

Nikephoros I of the Byzantine Empire and Charlemagne of the Holy Roman Empire settle their imperial boundaries and sign Pax Nicephori.
Venice is recognized as independent by the Byzantine Empire.
Stiftskeller St. Peter, possibly Central Europe's oldest restaurant is founded.^[1]
Khan Krum rises on the throne of the First Bulgarian Empire.

Unsuccessful rebellion of the Byzantine general Bardanes Tourkos against Nikephoros in western Anatolia.
Fall of the Barmakids from power in the Abbasid Caliphate.