The project has for an object a complete overview of the meaning and place of Early Christian Temples (this includes churches, basilicas and martyria) in the settlements in these two dioceses during the period in question. It is planned to include all excavated and published church buildings of that period. Topography, specifications, measurements of all temples is going to be taken into consideration, as well as their relations to other archaeological sites. A separate part of the work is going to be dedicated to the historical and epigraphic sources on the subject. The research aims to clarify the details concerning the functional character of the temples.