From Wikipedia, the free encyclopedia.
Centuries: 6th century - 7th century - 8th century
Decades: 590s 600s 610s 620s 630s - 640s - 650s 660s 670s 680s 690s
Years: 642 643 644 645 646 - 647 - 648 649 650 651 652
Events
- The Cheomseongdae astronomical observatory is constructed in Silla around this time.
