The data may be viewed on a variety of maps (selected by clicking on the icon at the top right). The only historical map currently available is the Digital Atlas of the Roman Empire. I hope to add other historical maps if they become available.

Places are grouped by modern rather than historical regions, partly because of the fluidity of historical boundaries and partly because modern regions are often used for manuscript localisations by Lowe and Bischoff. Regions are indicated on the map by larger, lighter circles.