Frontiers of the Roman Empire is a World Heritage Site. The site includes three walls in different parts of Europe. They were part of the frontiers of the Roman Empire.
Limes (plural: 'Limites') is the Latin name of walls at the border of the Roman empire. There were many such fortifications.[1]
The Latin word has a number of meanings, but the most common one is border.[2]
The term limes was used by Roman writers to describe paths, walls, boundary stones, rivers marking a boundary,[1] but its meaning was not the same as the modern boundary.[2]
↑ 2.02.1Ellenblum, Roni. (2006). Crusader castles and modern histories, p. 122; excerpt, "...it is the modern traveller and scholar who attributes to the limes all the meanings of a boundary line. The Roman sources themselves are mute concerning the existence of border lines, and it was modern scholarship which assumed that the Romans were capable of realizing in practice what they could not define verbally."