171

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title: "171" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["171"] topic_path: "general/171" source: "https://en.wikipedia.org/wiki/171" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

Year 171 (CLXXI) was a common year starting on Monday 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.

Events

::figure[src="https://upload.wikimedia.org/wikipedia/commons/8/88/Eleusis.JPG" caption="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)

References

Kovács, Péter. (2009). "Marcus Aurelius' rain miracle and the Marcomannic wars". Brill.

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