620s
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| Millennia: | 1st millennium |
| Centuries: | 6th century - 7th century - 8th century |
| Decades: | 590s 600s 610s - 620s - 630s 640s 650s |
| Years: | 620 621 622 623 624 625 626 627 628 629 |
| Categories: | Births - Deaths - Architecture Establishments - Disestablishments |
[edit] Events and Trends
- 627 — The Roman-Persian Wars end.
- 622 — Year one of the Islamic calendar begins, during which the Hijra occurs — Muhammad and his followers emigrate from Mecca to Medina in September.
- 629, The Byzantine-Arab Wars begin. Much of the Roman Empire is conquered by Muslim Arabs led by Khalid ibn al-Walid.
