Seven Holy Founders 6741 S Rock Hill Rd, Affton, MO63123 Seven Holy Founders is a Catholic parish serving approximately 1,700 families. The parish has been in this community…More since 1927 and has implemented many programs to get the community involved. It offers sports for youths of all ages from basketball to volleyball. There are youth study groups, volunteer groups to work within the church and community. Seven Holy Founders even has a school from pre-K to 8th grade.