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537 in various calendars
Gregorian calendar	537; DXXXVII
Ab urbe condita	1290
Assyrian calendar	5287
Balinese saka calendar	458–459
Bengali calendar	−57 – −56
Berber calendar	1487
Buddhist calendar	1081
Burmese calendar	−101
Byzantine calendar	6045–6046
Chinese calendar	丙辰年 (Fire Dragon); 3234 or 3027; — to —; 丁巳年 (Fire Snake); 3235 or 3028
Coptic calendar	253–254
Discordian calendar	1703
Ethiopian calendar	529–530
Hebrew calendar	4297–4298
Hindu calendars
- Vikram Samvat	593–594
- Shaka Samvat	458–459
- Kali Yuga	3637–3638
Holocene calendar	10537
Iranian calendar	85 BP – 84 BP
Islamic calendar	88 BH – 87 BH
Javanese calendar	424–425
Julian calendar	537; DXXXVII
Korean calendar	2870
Minguo calendar	1375 before ROC; 民前1375年
Nanakshahi calendar	−931
Seleucid era	848/849 AG
Thai solar calendar	1079–1080
Tibetan calendar	阳火龙年; (male Fire-Dragon); 663 or 282 or −490; — to —; 阴火蛇年; (female Fire-Snake); 664 or 283 or −489

Millennium:	1st millennium
Centuries:	5th century; 6th century ; 7th century;
Decades:	510s; 520s; 530s ; 540s; 550s;
Years:	534; 535; 536; 537 ; 538; 539; 540;

Year 537 (DXXXVII) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Second year after the Consulship of Belisarius (or, less frequently, year 1290 Ab urbe condita). The denomination 537 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

By place

Byzantine Empire

March 2 – Siege of Rome: The Ostrogothic army (45,000 men) under King Vitiges begins the siege of the city. Belisarius conducts a delaying action outside the Flaminian Gate; he and a detachment of his bucellarii are almost cut off.^[1]
Vitiges sets up seven camps, overlooking the main gates and access routes to the city, in order to starve it out. He blocks the Roman aqueducts that are supplying Rome with water, necessary both for drinking and for operating the corn mills.^[2]
March 21 – Vitiges attempts to assault the northern and eastern city walls with four siege towers, but is repulsed at the Praenestine Gate, known as the Vivarium, by the defenders under the Byzantine generals Bessas and Peranius.^[3]
April – The Goths capture the Portus Claudii at Ostia; the harbor is left unguarded by the Romans. Belisarius is forced to unload his supplies at Antium; he sends urgent messages for reinforcements to Constantinople.^[4]
April 9 – Belisarius receives his promised reinforcements: 1,600 cavalry, mostly of Hunnic or Slavic origin and expert bowmen. Despite shortages, he starts raids against the Gothic camps and Vitiges is forced into a stalemate.^[5]
June – In Rome, famine brings the city to despair; Belisarius sends his secretary Procopius to Naples for more reinforcements and supplies. Vitiges arranges a three-month armistice for Gothic envoys to travel to Constantinople.^[6]
November – Belisarius brings his long-awaited reinforcements, namely 3,000 Isaurians and 1,800 cavalry embarked in Ostia, along with a supply convoy, safely to Rome. The Goths are forced to abandon the Portus Claudii.^[7]
December – Belisarius sends John "the Sanguinary" with a force of 2,000 men towards Picenum, to plunder the east coast of Italy. He arrives at Ariminum (Rimini), where he is welcomed by the local Roman population.^[8]
December 27 – The construction of the Hagia Sophia in Constantinople (begun in 532) is completed.

Britain

Battle of Camlann: King Arthur fights his last battle against the forces of his rebellious son (or nephew) Mordred, and is mortally wounded (according to the 10th-century Annales Cambriae).

Africa

Spring – Battle of Scalas Veteres (6 km south of Carthage, in the Praetorian prefecture of Africa): Byzantine troops under Germanus crush a large-scale mutiny. Stotzas, leader of the rebellion, flees with a handful of followers to Mauretania.^[9]

Asia

Eastern Wei sends an advance guard of three army columns through the Tong Pass, to attack Western Wei. The Western army under Yu-Wen Tai defeats one of the columns while the others retreat. Yu-Wen follows up, but runs into the main Eastern army (200,000 men). The Westerners are pushed back through the pass, and the Eastern army emerges from the mountains. Unexpectedly they are charged in the flank by 10,000 Western cavalry, and 6,000 Easterners are killed and 70,000 captured.^[10]
John Cottistis starts a short-lived rebellion against Justinian I. He is declared emperor at Dara, but is killed four days later by conspiring soldiers.^[11]