191 BC

Millennium:	1st millennium BC
Centuries:	3rd century BC – 2nd century BC – 1st century BC
Decades:	220s BC 210s BC 200s BC – 190s BC – 180s BC 170s BC 160s BC
Years:	194 BC 193 BC 192 BC – 191 BC – 190 BC 189 BC 188 BC

191 BC by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments

**191 BC in other calendars**
Gregorian calendar	191 BC
Ab urbe condita	563
Armenian calendar	N/A
Bahá'í calendar	-2034 – -2033
Bengali calendar	-783
Berber calendar	760
Buddhist calendar	354
Burmese calendar	-828
Byzantine calendar	5318 – 5319
Chinese calendar	[[Sexagenary cycle\|]]年 (2446/2506) — to — [[Sexagenary cycle\|]]年 (2447/2507)
Coptic calendar	-474 – -473
Ethiopian calendar	-198 – -197
Hebrew calendar	3570 – 3571
Hindu calendars
- Bikram Samwat	-134 – -133
- Shaka Samvat	N/A
- Kali Yuga	2911 – 2912
Holocene calendar	9810
Iranian calendar	812 BP – 811 BP
Islamic calendar	837 BH – 836 BH
Japanese calendar
Korean calendar	2143
Thai solar calendar	353

Events

The Romans under Manius Acilius Glabrio and Cato the Elder cut the Seleucid king Antiochus III off from his reinforcements in Thrace and outflank his position at the pass of Thermopylae in the Battle of Thermopylae. With the remainder of his troops, Antiochus flees to Chalcis on Euboea and from there he retreats by sea to Ephesus.
Manius Acilius Glabrio then turns his attention to the Aetolian League, which has persuaded Antiochus to declare war against Rome, and is only prevented from crushing them by the intercession of Titus Quinctius Flamininus.
Scipio Africanus persuades the Roman Senate to continue the war against Antiochus III by making him the chief commander and allowing him and his brother, Lucius Cornelius Scipio Asiaticus, to follow Antiochus into Anatolia.
The Roman calendar, which is four months ahead of the seasons, is adjusted (by Lex Acilia de intercalando).
Cisalpine Gaul becomes a Roman province.

The Carthaginians manage to collect the indemnity due to Rome (through the peace treaty signed between them ten years earlier) but not payable in full for 50 years. The Romans, in order to keep their hold on Carthage, refuse to accept the early payment of the indemnity.

Arsaces II, king of Parthia, is considered to have been murdered on the orders of Antiochus III. Arsaces is succeeded by his cousin Phriapatius.