This is Cha Si-Ah’s (Shin Hye-Sun) work place in The Legend of the Blue Sea (푸른 바다의 전설) (SBS, 2016-17). In episode 9 and 10 she brings Heo Joon-Jae (Lee Min-Ho) here to show him their last found – a portrait of Dam Ryung. Once inside the storage room, Joon-Jae walks up to the portrait and realizes that Dam Ryung is his look-alike.
The National Palace Museum of Korea [국립고궁박물관] is situated on the grounds of the Gyeongbokgung Palace. It is located in Seoul’s neighborhood of Cheongunhyoja [Cheongunhyoja-dong/청운효자동] in the Jongno district [Jongno-gu/종로구].
12 Hyoja-ro, Jongno 1(il).2(i).3(sam).4(sa), Jongno-gu, Seoul
서울 종로구 효자로 12
Geolocation: 37.576557, 126.974882
Gyeongbokgung Station [경복궁역], Seoul Subway Line 3, Exit 5
— submitted by Marion KDL