Prior to August 1978, the parish boundaries belonged entirely to Holy Family Parish on Lower Roswell Road. Realizing the building and growth in Cobb County and particularly in East Cobb, the Archbishop Thomas A. Donnellan of Atlanta on April 11, 1976 purchased 7.18 acres of land at the corner of Bishop Lake Road and Roswell Road for a future parish. On July 3, 1978, the Archbishop, established the fifth Catholic Church in Cobb County. The parish was first called The Bishop Lake Catholic Church and on September 20, 1978, after consulting the parishioners, the Archbishop placed the new parish under the patronage of St. Ann Mother of the Blessed Virgin Mary