The episcopal centres in the Early Byzantium
  Episcopal centres, such as those of Resafa and Philippi, were large complexes clustered around the church and its atrium. They comprised the residence of the bishop, quarters for the clergy and the visitors, offices, warehouses and, occasionally, a bathing establishment. The main church was provided with a baptistery, which sometimes had a secondary church attached to it, or with a shrine endorsing the tomb of a saint.