171

This article is about the year 171. For the number, see 171 (number). For the year of the pre-Julian Roman calendar, see 171 BC. For other uses, see 171 (disambiguation).

Year 171 (CLXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known in Rome as the Year of the Consulship of Severus and Herennianus (or, less frequently, year 924 Ab urbe condita). The denomination 171 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.

Millennium:	1st millennium
Centuries:	1st century 2nd century 3rd century
Decades:	150s 160s 170s 180s 190s
Years:	168 169 170 171 172 173 174

171 in various calendars

Gregorian calendar	171 CLXXI
Ab urbe condita	924
Assyrian calendar	4921
Balinese saka calendar	92–93
Bengali calendar	−422
Berber calendar	1121
Buddhist calendar	715
Burmese calendar	−467
Byzantine calendar	5679–5680
Chinese calendar	庚戌年 (Metal Dog) 2868 or 2661     — to — 辛亥年 (Metal Pig) 2869 or 2662
Coptic calendar	−113 – −112
Discordian calendar	1337
Ethiopian calendar	163–164
Hebrew calendar	3931–3932
Hindu calendars
- Vikram Samvat	227–228
- Shaka Samvat	92–93
- Kali Yuga	3271–3272
Holocene calendar	10171
Iranian calendar	451 BP – 450 BP
Islamic calendar	465 BH – 464 BH
Javanese calendar	47–48
Julian calendar	171 CLXXI
Korean calendar	2504
Minguo calendar	1741 before ROC 民前1741年
Nanakshahi calendar	−1297
Seleucid era	482/483 AG
Thai solar calendar	713–714
Tibetan calendar	阳金狗年 (male Iron-Dog) 297 or −84 or −856     — to — 阴金猪年 (female Iron-Pig) 298 or −83 or −855

Events

Ruins at Eleusis (Greece). View over the excavation site towards the Saronic Gulf.

By place

Roman Empire

• Emperor Marcus Aurelius forms a new military command, the praetentura Italiae et Alpium. Aquileia is relieved, and the Marcomanni are evicted from Roman territory.
• Marcus Aurelius signs a peace treaty with the Quadi and the Sarmatian Iazyges. The Germanic tribes of the Hasdingi (Vandals) and the Lacringi become Roman allies.
• Armenia and Mesopotamia become protectorates of the Roman Empire.
• The Costoboci cross the Danube (Dacia) and ravage Thrace in the Balkan Peninsula. They reach Eleusis, near Athens, and destroy the temple of the Eleusinian Mysteries.
• May – June – Aelius Aristides, Greek orator, delivers a public speech in Smyrna, lamenting the damage recently inflicted to the sacred site of Eleusis.

Births

• Sima Lang, Chinese official and politician (d. 217)
• Tian Yu, Chinese general and politician (d. 252)
• Xu Gan, Chinese philosopher and poet (d. 218)
• Zhao Yan, Chinese general and politician (d. 245)