8 votes Cheomseongdae: the oldest surviving astronomical observatory in East Asia Posted March 2 by xk3 Tags: astronomy, south korea.gyeongju, history, middle ages.early, observatories, cheomseongdae, source.wikipedia https://en.wikipedia.org/wiki/Cheomseongdae Link information This data is scraped automatically and may be incorrect. Title Cheomseongdae - Wikipedia Word count 603 words