Architecture of Scotland in the Roman era England. Around 141 CE they moved up to construct a new "limes", a sward-covered wall made of turf known as the Antonine Wall, the largest Roman structure in modern Scotland. They soon retreated to Hadrian's Wall, with occasional expeditions that involved the building and reoccupation of forts, until the collapse of Roman power in the early fifth century. Caledonia was the name that the Romans gave to the land north of their province of Britannia. In his "Geographia", Ptolemy, possibly drawing on earlier sources of information as well as more contemporary accounts from the Agricolan invasion, identified 19 "towns" in
Scotland during the Roman Empire Ken MacLeod, "Warriors of Alavna" by N. M. Browne, and in the feature films "The Last Legion", "Centurion" and "The Eagle". Scotland during the Roman Empire Scotland during the Roman Empire refers to the protohistorical period during which the Roman Empire interacted with the area that is now Scotland, which was known to them as "Caledonia". Roman legions arrived around 71, having conquered the Celtic tribes of "Britain" (England and Wales) over the preceding three decades. Aiming to annex all of the island of "Albion", Romans under Q. Petilius Cerialis and Gn. Julius Agricola invaded the Caledonians in the 70s