This paper considers the circumstantial evidence for a Mappa Mundi of Roman origin and introduces a methodology for examining that possibility. Julius Caesar (100-44BC) ordered that a world survey be carried out to establish the extent of the Roman Empire and perhaps the adjoining lands which as then had not been conquered. Following the commencement of a new era, BC/AD we find cartographers such as Marinus of Tyre and Claudius Ptolemy producing quite remarkable maps, with for the era an un-paralleled accuracy. Although evidence of the Roman survey is limited, it can only be from official Roman sources that those two cartographers received their latest data. Thus by analysing the works of authorities who succeeded the Romans, such as the Early Christian Church, we can perhaps establish the veracity of the historical texts. Fortunately, those works can be examined by a study of a landscape phenomenon which can only exist because there was a map of sufficient quality and accuracy to allow the concept discovered to be formed. By studying the positions in the landscape of Early Christian edifices of a particular nature, noting the methodology and metrology used, it is possible to conclude that there was a Roman Mappa Mundi dating to the BC/AD interface.
8 A4 pages and 6 full colour diagram maps
