Daily 10 a.m. - 6 p.m. when there is an exhibition. Exhibitions are held only two weeks in May and October - check before going.
No admission fee.
Wikipedia https://ko.wikipedia.org/wiki/간송미술관
전화 +82 2 762 0442
주소 97-1 Seongbuk-dong, Seongbuk-gu, Seoul, South Korea
좌표 37°35'36.971" N 126°59'48.444" E