| 291 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 291 BC |
| Ab urbe condita | 463 |
| Armenian calendar | N/A |
| Assyrian calendar | 4460 |
| Bahá'í calendar | -2134–-2133 |
| Bengali calendar | -883 |
| Berber calendar | 660 |
| English Regnal year | N/A |
| Buddhist calendar | 254 |
| Burmese calendar | -928 |
| Byzantine calendar | 5218–5219 |
| Chinese calendar | 己巳年 (2346/2406) — to —
庚午年(2347/2407) |
| Coptic calendar | -574–-573 |
| Ethiopian calendar | -298–-297 |
| Hebrew calendar | 3470–3471 |
| Hindu calendars | |
| - Vikram Samvat | -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 |
| Minguo calendar | 2202 before ROC 民前2202年 |
| Thai solar calendar | 253 |
| Wikimedia Commons has media related to: 291 BC |
Year 291 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Megellus and Brutus (or, less frequently, year 463 Ab urbe condita). The denomination 291 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.
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