This article concerns the period 639 BC – 630 BC.

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• 639 BC - Interregnum ends and Ancus Marcius becomes the king of Rome.
• 637 BC — Sadyattes becomes king of Lydia.^[1]
• 636 BC — Duke Wen of Jin ascends to power in the State of Jin during the Zhou Dynasty of China.
• 635 BC — Alyattes becomes king of Lydia^[1]
• 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).

• 638 BC—Birth of Solon, lawmaker of Athens (approximate date)^[2]
• 637 BC—Death of Ardys, Lydia^[1]
• 637 BC—Death of Duke Xiang of Song, China
• 635 BC—Birth of Thales, Greek philosopher (d. 543 BC) (approximate date)
• 635 BC—Death of Sadyattes, Lydia^[1]
• 634 BC—Birth of Jehoiakim, 18th king of Judah (approximate date)
• 632 BC—Birth of Jehoahaz, 17th king of Judah (approximate date)
• 630 BC—Birth of Sappho (approximate date)