첨성대(瞻, cheom)(星, seong)(臺, Dae)(2)to observe(3) Stars.(1)Place A tower to observe stars built in AD 647 in Silla kingdom [1, 55]. It is called 'Cheom Seong Dae'. This is the oldest surviving astronomical observatory in the world among the one without any reconstruction [2].Despite experiencing several earthquakes, wars, and natural disasters, it still maintains its original appearance. It was b..
