A. Sutherland – AncientPages.com – The Cheomseongdae Observatory located in Gyeongju, South Korea originates from the flourishing Silla period. Constructed in 632, the Cheomseongdae (“star-gazing tower” or “star-observing terrace”) is the oldest astronomical observatory in East Asia.
Cheomseongdae Observatory at night. source
It is a stone cylindrical-shaped structure composed of 362 granite blocks that represent the 362 days of the lunar year.
It is a symbol of early astronomy and the Southern observatory of the European astronomers working in Chile is called – Silla.