591

591 in various calendars
Gregorian calendar	591; DXCI
Ab urbe condita	1344
Armenian calendar	40; ԹՎ Խ
Assyrian calendar	5341
Balinese saka calendar	512–513
Bengali calendar	−3 – −2
Berber calendar	1541
Buddhist calendar	1135
Burmese calendar	−47
Byzantine calendar	6099–6100
Chinese calendar	庚戌年 (Metal Dog); 3288 or 3081; — to —; 辛亥年 (Metal Pig); 3289 or 3082
Coptic calendar	307–308
Discordian calendar	1757
Ethiopian calendar	583–584
Hebrew calendar	4351–4352
Hindu calendars
- Vikram Samvat	647–648
- Shaka Samvat	512–513
- Kali Yuga	3691–3692
Holocene calendar	10591
Iranian calendar	31 BP – 30 BP
Islamic calendar	32 BH – 31 BH
Javanese calendar	480–481
Julian calendar	591; DXCI
Korean calendar	2924
Minguo calendar	1321 before ROC; 民前1321年
Nanakshahi calendar	−877
Seleucid era	902/903 AG
Thai solar calendar	1133–1134
Tibetan calendar	ལྕགས་ཕོ་ཁྱི་ལོ་; (male Iron-Dog); 717 or 336 or −436; — to —; ལྕགས་མོ་ཕག་ལོ་; (female Iron-Boar); 718 or 337 or −435

Year 591 (DXCI) was a common year starting on Monday of the Julian calendar. The denomination 591 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

Byzantine–Sassanid War: Emperor Maurice, seeing an opportunity to end the prolonged war to the advantage of Constantinople, assists Khosrau II to regain the Persian throne. He sends a Byzantine army (35,000 men) under Narses into Mesopotamia, through Syria. At the same time, an expeditionary force in Armenia advances through Caucasian Iberia into Media (modern Azerbaijan).
Battle of Blarathon: A Persian army of about 40,000 men under King Bahrām VI is defeated, in the lowlands near Ganzak (northwestern Iran), by the Byzantines. Bahrām flees to seek refuge with the Turks in Central Asia, and settles in Fergana.^[1] However, after some time, he is murdered by a hired assassin of Khosrau II.^[2]
Summer – Maurice begins a series of military expeditions, to defend the Balkan provinces from the Avars and Slavs. He establishes the Danube frontier (Limes Moesiae) from the Delta to the fortress city of Singidunum (Belgrade), and permits the Byzantines to reassert their authority in the interior.^[3]

Agilulf, cousin of Authari (called "the Thuringian"), is raised on the shield (a ceremonial investment) by Lombard warriors in Milan. He becomes king of the Lombards, on advice of the Lombard dukes (dux). Agilulf marries widowed queen Theodelinda and is baptized to please her.
Arechis I succeeds his uncle Zotto as the second Duke of Benevento.
A locust swarm destroys the harvest in Northern Italy (approximate date).

Khosrau II is reinstalled as king of the Persian Empire. Peace with Constantinople is concluded after a war of almost 20 years. Maurice receives the Persian provinces of Armenia and Georgia. The recognition of the traditional frontiers, and the cessation of subsidies for the Caucasus forts, leaves the Byzantines in a dominant position in their relations with Persia.

Pope Gregory I criticizes the bishops of Arles and Marseille for allowing the forced baptism of Jews in Provence (France).
Jnanagupta, Afghan Buddhist monk, translates the Vimalakirti Sutra into Chinese.

Years
Millennium
1st millennium
Centuries
5th century 6th century 7th century
Decades
570s 580s 590s 600s 610s
Years
588 589 590 591 592 593 594
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