Queen Seondeok: the first Korean queen who proved that women rule Olly Media ngày 22 tháng 10 năm 2017 Another famous structure built on her orders is the Cheomseongdae, the Star-Gazing Tower. Built of 362 pieces of cut granite set in 27 layers (some lunar year and month and day symbolism going on there), it was the first dedicated astronomical observatory in East Asia