Vallum (Hadrian's Wall) Scotland and the temporary abandonment of Hadrian's Wall. It is worth noticing at this point that the Antonine Wall was a less formidable barrier than Hadrian's Wall, for two main reasons: firstly, because it was built out of turf rather than stone; and secondly, because it had no equivalent ditch system like the Vallum behind the Wall. It may have been for these reasons that the Antonine Wall was not garrisoned for very long. Vallum (Hadrian's Wall) The Vallum is a huge earthwork associated with Hadrian's Wall in England. Unique on any Roman frontier, it runs practically from coast to
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