291 BC

Millennium:	1st millennium BC
Centuries:	4th century BC – 3rd century BC – 2nd century BC
Decades:	320s BC 310s BC 300s BC – 290s BC – 280s BC 270s BC 260s BC
Years:	294 BC 293 BC 292 BC – 291 BC – 290 BC 289 BC 288 BC

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

**291 BC in other calendars**
Gregorian calendar	291 BC
Ab urbe condita	463
Armenian calendar	N/A
Bahá'í calendar	-2134 – -2133
Bengali calendar	-883
Berber calendar	660
Buddhist calendar	254
Burmese calendar	-928
Byzantine calendar	5218 – 5219
Chinese calendar	[[Sexagenary cycle\|]]年 (2346/2406) — to — [[Sexagenary cycle\|]]年 (2347/2407)
Coptic calendar	-574 – -573
Ethiopian calendar	-298 – -297
Hebrew calendar	3470 – 3471
Hindu calendars
- Bikram Samwat	-234 – -233
- Shaka Samvat	N/A
- Kali Yuga	2811 – 2812
Holocene calendar	9710
Iranian calendar	912 BP – 911 BP
Islamic calendar	940 BH – 939 BH
Japanese calendar
Korean calendar	2043
Thai solar calendar	253

Events

Demetrius Poliorcetes joins his son, Antigonus, in the siege of Thebes. As the Thebans defend their city stubbornly, Demetrius forces his men to attack the city at great cost. Demetrius finally takes the city after using siege engines to demolish its walls.

Menander, Athenian dramatist, considered to be a master of Greek New Comedy (b. c. 342 BC)
Dinarchus, Athenian speech writer whose work is generally thought to reflect the gradual decline of Attic oratory (b. c. 361 BC)