181 BC

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Millennium: 1st millennium BC
Centuries: 3rd century BC2nd century BC1st century BC
Decades: 210s BC  200s BC  190s BC  – 180s BC –  170s BC  160s BC  150s BC
Years: 184 BC 183 BC 182 BC181 BC180 BC 179 BC 178 BC
181 BC in other calendars
Gregorian calendar 181 BC
Ab urbe condita 573
Armenian calendar N/A
Assyrian calendar 4570
Bahá'í calendar −2024 – −2023
Bengali calendar −773
Berber calendar 770
English Regnal year N/A
Buddhist calendar 364
Burmese calendar −818
Byzantine calendar 5328–5329
Chinese calendar 己未(Earth Goat)
2516 or 2456
    — to —
庚申年 (Metal Monkey)
2517 or 2457
Coptic calendar −464 – −463
Discordian calendar 986
Ethiopian calendar −188 – −187
Hebrew calendar 3580–3581
Hindu calendars
 - Vikram Samvat −124 – −123
 - Shaka Samvat N/A
 - Kali Yuga 2921–2922
Holocene calendar 9820
Igbo calendar −1180 – −1179
Iranian calendar 802 BP – 801 BP
Islamic calendar 827 BH – 826 BH
Japanese calendar N/A
Juche calendar N/A
Julian calendar N/A
Korean calendar 2153
Minguo calendar 2092 before ROC
Thai solar calendar 363

Year 181 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Cethegus and Tamphilus (or, less frequently, year 573 Ab urbe condita). The denomination 181 BC 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.


By place[edit]


Roman Republic[edit]

  • Rome founds a colony at Aquileia, on the narrow strip of land between the mountains and the lagoons, as a frontier fortress to check the advance of the Illyrians.

Asia Minor[edit]

  • Pharnaces I of Pontus decides to attack both Eumenes II of Pergamum and Ariarathes IV of Cappadocia and therefore invades Galatia with a large force. Eumenes leads an army to oppose him, however, hostilities are soon suspended following the arrival of Roman deputies, who have been appointed by the Roman Senate to inquire into the matters in dispute. Negotiations take place at Pergamum but are inconclusive, with Pharnaces' demands being rejected by the Romans as unreasonable. As a consequence, the war between Pontus and Pergamum and Cappadocia is renewed.