The Probert Encyclopaedia of Architecture

WALL OF ANTONIUS

The Wall of Antoninus or Graham's Dyke was a barrier erected by the Romans across the isthmus between the Forth and the Clyde, in the reign of Antoninus Pius. Its western extremity was at or near Dunglass Castle, its eastern at Carriden, and the whole length of it exceeded 27 miles. It was constructed in 140 by Lollius Urbicus, the imperial legate, and consisted of a ditch 40 feet wide and 20 feet deep, and a rampart of stone and earth on the south side 24 feet thick and 20 feet in height. It was strengthened at each end and along its course by a series of forts and watch-towers. It may still be traced at various points.
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