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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.
The Hadrian's Wall in northern England, built to separate the Romans from the barbarians, extended 117 kilometres from Wallsend-on-Tyne in the east to Bowness-on-Solway in the west. All the walls were built for the purpose of military defence, and the Great Wall of China was no exception. Yet the Great Wall is unique. It was first built in the 7th century B.C. when China was still divided into many small states.