Research Aim: A church is a structure used by Christians to carry out their religious activities and worship. Traditionally, its interior is built in the Christian cross’s shape, and its components included; center aisle, alter, bema, and seats. However, the church building may also have a courtyard, apse, and mausoleum. The modern church buildings may have different structures and components. Therefore in this study, the traditional and modern church buildings are compared and contrasted to identify the mandatory components of a Christian Church.