Architecture of Scotland in the Roman era the death of Severus in 210 the Romans withdrew back to Hadrian's Wall, which would be the frontier until Roman authority in Britain collapsed in the fifth century. Architecture of Scotland in the Roman era The architecture of Scotland in the Roman era includes all building within the modern borders of Scotland, from the arrival of the Romans in northern Britain in the first century BCE, until their departure in the fifth century. Although Ptolemy indicated that there were 19 "towns" in Caledonia, north of the Roman province of Britannia, no clear evidence of urban settlements has been found and
Architecture of Scotland Trimontium, and a continuous fortification between the Firth of Forth and the Firth of Clyde known as the Antonine Wall, built in the second century AD. Beyond Roman influence, there is evidence of wheelhouses and underground souterrains. After the departure of the Romans there were a series of nucleated hill forts, often utilising major geographical features, as at Dunadd and Dunbarton. Castles arrived in Scotland with the introduction of feudalism in the twelfth century. Initially these were wooden motte-and-bailey constructions, but many were replaced by stone castles with a high curtain wall. In the late Middle Ages new castles were