521 BC
| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 7th century BC · 6th century BC · 5th century BC |
| Decades: | 550s BC · 540s BC · 530s BC · 520s BC · 510s BC · 500s BC · 490s BC |
| Years: | 524 BC · 523 BC · 522 BC · 521 BC · 520 BC · 519 BC · 518 BC |
| 521 BC by topic |
| Politics |
|---|
| Categories |
|
| Gregorian calendar | 521 BC DXX BC |
| Ab urbe condita | 233 |
| Ancient Egypt era | XXVII dynasty, 5 |
| - Pharaoh | Darius I of Persia, 1 |
| Ancient Greek era | 64th Olympiad, year 4 |
| Assyrian calendar | 4230 |
| Bengali calendar | −1113 |
| Berber calendar | 430 |
| Buddhist calendar | 24 |
| Burmese calendar | −1158 |
| Byzantine calendar | 4988–4989 |
| Chinese calendar | 己卯年 (Earth Rabbit) 2176 or 2116 — to — 庚辰年 (Metal Dragon) 2177 or 2117 |
| Coptic calendar | −804 – −803 |
| Discordian calendar | 646 |
| Ethiopian calendar | −528 – −527 |
| Hebrew calendar | 3240–3241 |
| Hindu calendars | |
| - Vikram Samvat | −464 – −463 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2580–2581 |
| Holocene calendar | 9480 |
| Iranian calendar | 1142 BP – 1141 BP |
| Islamic calendar | 1177 BH – 1176 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1813 |
| Minguo calendar | 2432 before ROC 民前2432年 |
| Nanakshahi calendar | −1988 |
| Thai solar calendar | 22–23 |
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The year 521 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 233 Ab urbe condita. The denomination 521 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.
Events
By place
Persian Empire
Deaths
References
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