As the most advanced frontier construction of its time, and as definitive evidence of the Romans' time in Scotland, the Antonine Wall is an invaluable and fascinating part of this country's varied and violent history. For a generation, from about AD 140 to 160, the Antonine Wall was the north-west frontier of the Roman Empire. Constructed by the Roman army, it ran from modern Bo'ness on the Forth to Old Kilpatrick on the Clyde and consisted of a turf...