Landmarks & buildings
National Museum of Modern and Contemporary Art, Seoul
National Museum of Modern and Contemporary Art, Seoul is named as a filming location of The Royal Tailor by a published source, listed below with its publisher and its sentence. No wiki records a shoot here yet.

From published sources
Newspapers, film offices, archives and city filming permits say these were filmed at National Museum of Modern and Contemporary Art, Seoul. Each source is linked.
Filming locations nearby
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Castles & palaces
Gyeongbokgung
South Korea · under 1 km
Palace in Seoul, South Korea
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Landmarks & buildings
Baek Inje House
South Korea · under 1 km
Building in Jongno District, South Korea
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Landmarks & buildings
Gwanghwamun
South Korea · under 1 km
Main gate of Geongbokgung Palace (also known as Kyŏngbokkung Palace)
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Towns & cities Gahoe-dong
South Korea · under 1 km
Administrative division in Jongno-gu, Seoul
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Landmarks & buildings
Rakkojae
South Korea · under 1 km
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Landmarks & buildings
Cheondogyo Jungangdaegyodang
South Korea · under 1 km