Cheonjugyo Sejongno Seongdang is a Catholic church in Jongno, Seoul, where Mass and prayer are held in the city center. The parish has a history of more than 70 years and also holds dawn Mass. Mass is conducted in the Seoul dialect, which may be unfamiliar, and the church is not large. The bell rings loudly every day at 6 a.m. and noon, which is a burden to nearby residents.