Roman population size: the logic of the debate

evidence

Empire-wide population at the mid-2nd century CE is estimated in a range of roughly 59-72 million, with the wider scholarly spread running from c. 46 million under Augustus (Frier) to 60-90 million at the high end. The familiar '60 million' is one point inside a contested range, not a measured figure; the underlying Italian census debate (low count vs high count) is unresolved.

A evidence is not a place. Drawing it on a map would assert something about the world that no stored fact supports.