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Categories
:
647
647
Years:
643
644
645
646
-
647
-
648
649
650
651
Decades
:
610s
620s
630s
-
640s
-
650s
660s
670s
Centuries
:
6th century
-
7th century
-
8th century
Events
The
Cheomseongdae astronomical observatory
is constructed in
Silla
around this time.
Categories
:
647
Last updated: 11-06-2004 06:43:22