663

663 in various calendars
Gregorian calendar	663; DCLXIII
Ab urbe condita	1416
Armenian calendar	112; ԹՎ ՃԺԲ
Assyrian calendar	5413
Balinese saka calendar	584–585
Bengali calendar	70
Berber calendar	1613
Buddhist calendar	1207
Burmese calendar	25
Byzantine calendar	6171–6172
Chinese calendar	壬戌年 (Water Dog); 3360 or 3153; — to —; 癸亥年 (Water Pig); 3361 or 3154
Coptic calendar	379–380
Discordian calendar	1829
Ethiopian calendar	655–656
Hebrew calendar	4423–4424
Hindu calendars
- Vikram Samvat	719–720
- Shaka Samvat	584–585
- Kali Yuga	3763–3764
Holocene calendar	10663
Iranian calendar	41–42
Islamic calendar	42–43
Japanese calendar	Hakuchi 14; (白雉１４年)
Javanese calendar	554–555
Julian calendar	663; DCLXIII
Korean calendar	2996
Minguo calendar	1249 before ROC; 民前1249年
Nanakshahi calendar	−805
Seleucid era	974/975 AG
Thai solar calendar	1205–1206
Tibetan calendar	阳水狗年; (male Water-Dog); 789 or 408 or −364; — to —; 阴水猪年; (female Water-Pig); 790 or 409 or −363

Millennium:	1st millennium
Centuries:	6th century; 7th century ; 8th century;
Decades:	640s; 650s; 660s ; 670s; 680s;
Years:	660; 661; 662; 663 ; 664; 665; 666;

Year 663 (DCLXIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 663 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

Emperor Constans II launches an assault against the Duchy of Benevento (Southern Italy). Taking advantage of the fact that Lombard king Grimoald I is engaged against Frankish forces from Neustria, Constans disembarks at Taranto and besieges Lucera and Benevento.
Constans II visits Rome for twelve days—the only emperor to set foot in Rome for two centuries—and is received with great honor by pope Vitalian. Constans gives the order to strip buildings, including the Pantheon, of their ornaments to be carried back to Constantinople.
Constans II moves the imperial court from Constantinople to Syracuse. He tries to stop the Arab conquest of Sicily and restores Rome as seat of the Byzantine Empire. Constans strips sacred altar vessels from churches all over Rome.
May 8 – Battle of Forino: The Byzantine army led by Constans II is defeated by the Lombards under Romuald I. He seizes Taranto and Brindisi, receiving military aid from the Bulgar Alcek horde who are settled in the area of Ravenna.

King Oswiu of Northumbria invades Pictland (modern Scotland). He establishes overlordship of, at least, the Southern Pictish sub-kingdoms of Fortriu and Fib (and possibly Circinn).
A brief outbreak of plague hits Britain (approximate date).

June 5 – In China, the Daming Palace becomes the government seat and royal residence of emperor Gao Zong of the Tang Dynasty.
Battle of Baekgang: Korean Baekje forces and their Japanese allies are defeated in a naval battle by a joint Silla–Tang coalition.

Wine, bishop of Winchester, moves the episcopal see north again to Dorchester.^[1]