| 490 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 490 BC |
| Ab urbe condita | 264 |
| Armenian calendar | N/A |
| Assyrian calendar | 4261 |
| Bahá'í calendar | -2333–-2332 |
| Bengali calendar | -1082 |
| Berber calendar | 461 |
| English Regnal year | N/A |
| Buddhist calendar | 55 |
| Burmese calendar | -1127 |
| Byzantine calendar | 5019–5020 |
| Chinese calendar | 庚戌年 (2147/2207) — to —
辛亥年(2148/2208) |
| Coptic calendar | -773–-772 |
| Ethiopian calendar | -497–-496 |
| Hebrew calendar | 3271–3272 |
| Hindu calendars | |
| - Vikram Samvat | -433–-432 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2612–2613 |
| Holocene calendar | 9511 |
| Igbo calendar | |
| - Ǹrí Ìgbò | -1489–-1488 |
| Iranian calendar | 1111 BP – 1110 BP |
| Islamic calendar | 1145 BH – 1144 BH |
| Japanese calendar | |
| Juche calendar | N/A (before 1912) |
| Julian calendar | |
| Korean calendar | 1844 |
| Minguo calendar | 2401 before ROC 民前2401年 |
| Thai solar calendar | 54 |
| Wikimedia Commons has media related to: 490 BC |
Year 490 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Camerinus and Flavus (or, less frequently, year 264 Ab urbe condita). The denomination 490 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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