Temple mass times: daily 10 a.m., 3 p.m.; no morning mass on Mon.
Museum: Tue - Sun: 9:30 a.m. - 5 p.m.
No admission fee.
Wikipedia https://en.wikipedia.org/wiki/Jeoldu-san
Official website http://www.jeoldusan.or.kr/language/english.html
More information on visitseoul.net http://www.visitseoul.net/en/article/article.do?_method=view&art_id=165&lang=en&m=0004003002005&p=03
Phone +82 2 3142 4434
Address 96-1 Hapjeong-dong, Mapo-gu, Seoul, South Korea
Coordinates 37°32'38.807" N 126°54'42.563" E