521 BC

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Millennium: 1st millennium BC
Centuries: 7th century BC6th century BC5th century BC
Decades: 550s BC  540s BC  530s BC  – 520s BC –  510s BC  500s BC  490s BC
Years: 524 BC 523 BC 522 BC521 BC520 BC 519 BC 518 BC
521 BC in other calendars
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(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

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[edit]

By place[edit]

Persian Empire[edit]

Births[edit]

Deaths[edit]

References[edit]