773

773 in various calendars
Gregorian calendar	773; DCCLXXIII
Ab urbe condita	1526
Armenian calendar	222; ԹՎ ՄԻԲ
Assyrian calendar	5523
Balinese saka calendar	694–695
Bengali calendar	180
Berber calendar	1723
Buddhist calendar	1317
Burmese calendar	135
Byzantine calendar	6281–6282
Chinese calendar	壬子年 (Water Rat); 3470 or 3263; — to —; 癸丑年 (Water Ox); 3471 or 3264
Coptic calendar	489–490
Discordian calendar	1939
Ethiopian calendar	765–766
Hebrew calendar	4533–4534
Hindu calendars
- Vikram Samvat	829–830
- Shaka Samvat	694–695
- Kali Yuga	3873–3874
Holocene calendar	10773
Iranian calendar	151–152
Islamic calendar	156–157
Japanese calendar	Hōki 4; (宝亀４年)
Javanese calendar	667–669
Julian calendar	773; DCCLXXIII
Korean calendar	3106
Minguo calendar	1139 before ROC; 民前1139年
Nanakshahi calendar	−695
Seleucid era	1084/1085 AG
Thai solar calendar	1315–1316
Tibetan calendar	阳水鼠年; (male Water-Rat); 899 or 518 or −254; — to —; 阴水牛年; (female Water-Ox); 900 or 519 or −253

Millennium:	1st millennium
Centuries:	7th century; 8th century ; 9th century;
Decades:	750s; 760s; 770s ; 780s; 790s;
Years:	770; 771; 772; 773 ; 774; 775; 776;

Year 773 (DCCLXXIII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar, the 773rd year of the Common Era (CE) and Anno Domini (AD) designations, the 773rd year of the 1st millennium, the 73rd year of the 8th century, and the 4th year of the 770s decade. The denomination 773 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

Summer – King Charlemagne and his uncle Bernard, son of Charles Martel, cross the Alps with a Frankish expeditionary force at the request of Pope Adrian I. At the foot of the mountains in the Susa Valley (Northern Italy), the Franks are hindered by Lombard fortifications. After scouting, Charlemagne attacks the defenders from the flank, and forces the Lombards to flee to the fortified capital Pavia.
Siege of Pavia: Charlemagne besieges Pavia, which is poorly stocked with food. King Desiderius remains in the capital, and orders his son Adalgis to defend Verona to guard Gerberga, and the children of Carloman I. After a short siege, Adalgis flees to Constantinople, where he is received by Emperor Constantine V. Meanwhile, the Franks capture the cities of Verona and Mortara.
Saxon Wars: Saxon forces seize upon Charlemagne's preoccupation with Italy to retake Eresburg and Syburg (near Dortmund). They unsuccessfully attack the episcopal centre of Büraburg, which had been established by St. Boniface (see 723).^[1]

King Alhred of Northumbria makes overtures of friendship toward Charlemagne (approximate date).

The number 0 is introduced to the city of Baghdad, which will be developed in the Middle East by Arabian mathematicians, who will base their numbers on the Indian system (long after the Maya culture developed the concept, cf. Maya numerals).^[2]

King Khongtekcha of Manipur (modern India) dies after a 10-year reign; during his rule the Meitei language script first appears.^[3]

A large and sudden increase in radiocarbon (¹⁴C) occurs around 773, in coral skeletons from the South China Sea^[4] (see 774-775 carbon-14 spike).

^ David Nicolle (2014). The Conquest of Saxony AD 782–785, p. 14. ISBN 978-1-78200-825-5
^ "The History Of Zero". Yale Global. April 25, 2009. Archived from the original on August 25, 2016.
^ "Indian Institute of Technology Guwahati". Archived from the original on April 11, 2005. Retrieved September 11, 2006.
^ Liu, Y; Zhang, ZF; Peng, ZC; Ling, MX; Shen, CC; Liu, WG; Sun, XC; Shen, CD; Liu, KX; Sun, W (2014). "Mysterious abrupt carbon-14 increase in coral contributed by a comet". Sci Rep. 4: 3728. Bibcode:2014NatSR...4E3728L. doi:10.1038/srep03728. PMC 3893640. PMID 24430984.
^ The Chronology of the Irish Annals, Daniel P. McCarthy