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In page Changdeokgung:

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Today there are 13 buildings remaining on the palace grounds and 28 pavilions in the gardens, occupying 110 acres (45 hectares) in all and the area is designated as Historical Site No. 122. Buildings of note include Donhwamun (built in 1412, rebuilt in 1607, with a copper bell weighing 9 short tons or 8 metric tons), Injeongjeon (main hall), Seongjeongjeon (auxiliary office in the main hall), Huijeongdang (the king's private residence, later used as a conference hall), Daejojeon (living quarters), and Nakseon-jae.