Cheomseongdae, Astronomical observatory in Gyeongju, South Korea.
The stone structure rises 9.17 meters high with a cylindrical body, resembling a bottle shape topped by a square platform.
Constructed during Queen Seondeok's reign in the 7th century, this observatory enabled Silla Kingdom astronomers to study celestial movements and predict seasonal changes.
The design incorporates 362 granite blocks arranged in 27 circular layers, representing both the lunar calendar and Queen Seondeok's position as 27th ruler.
Visitors reach the observatory by following the signs from Gyeongju National Museum, with the site open daily from sunrise to sunset.
The square window at the center divides the structure into 12 layers above and below, corresponding to months and zodiac signs.
Inception: 7 century
Part of: Gyeongju Historic Areas
GPS coordinates: 35.83472,129.21900
Latest update: May 26, 2025 21:46
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