Our Lady of Mercy Catholic High School will have an Open House Sunday, Jan. 28. Mass will begin at 9 a.m. in the auditorium and tours and performances will be held from 10 a.m. until 1 p.m. Visitors may visit teachers in their classrooms and tour the facility. Administration members will be on hand to answer questions. The school is on on Ga. Hwy. 279 in South Fulton County.