noun
Christian church
Refers to a church building or the Christian church as an institution.
日曜日にキリスト教会へ行きます。
I go to a Christian church on Sundays.
教会 is a general term for 'church' (any denomination), while キリスト教会 specifically means 'Christian church'.
Compound of キリスト (Christ) and 教会 (church).