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Hadrian's Wall was 80 Roman miles or 117.5 km (73.0 mi) long; its width and height varied according to the construction materials that were available nearby.
Hadrian's WallEncyclopÃ¦dia Britannica, Inc. Emperor Hadrian (ruled 117â138 ce) went to Britain in 122 and, in the words of his biographer, âwas the first to build a wall, 80 miles long, to separate the Romans from the barbarians.â