The Cheom-seong-dae, one of the earliest astronomical observatories in the world from Silla kingdom. Located in Kyongju, the capital city of Silla Kingdom (57 BCE - 668) built in 647

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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: 7th, astronomical, capital, century, cheom-seong-dae, city, earliest, kingdom, kingdom., korea, korean, kyongju, located, observatories, observatory, silla, space, world