630s BC

== Events and trends==

639 BC - Interregnum ends and Ancus Marcius becomes the king of Rome. 636 BC — Duke Wen of Jin ascends to power in the State of Jin during the Zhou Dynasty of China. 632 BC — Cylon, Athenian noble, seizes the Acropolis in a failed attempt to become king. 632 BC — In the Battle of Chengpu, the Chinese kingdom of Jin and her allies defeat the kingdom of Chu and her allies. 631 BC — Founding of Cyrene, a Greek colony in Libya (North Africa) (approximate date). 631 BC — Sadyattes becomes king of Lydia.

Significant people
638 BC—Birth of Solon, lawmaker of Athens (approximate date) 637 BC—Death of Duke Xiang of Song, China 635 BC—Birth of Thales, Greek philosopher (d. 543 BC) (approximate date) 630 BC—Birth of Sappho