Antoninus, Wall of,
ancient Roman wall extending across N Britain from the Firth of Forth to the Firth of Clyde. It was built by the Roman governor Lollius Urbicus in the reign of Emperor Antoninus Pius—probably in A.D.
140-42. Intended as a defense against the peoples to the north, it was built out of turf, with a ditch on the north and 19 forts along its southern side. The wall was 37 mi (60 km) long. It was abandoned c.185 when the Romans retreated to Hadrian's Wall
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