Hadrian’s wall stretched a full 80 miles across the province in Britannia, from Mais, the fort at Bowness on Solway in the West to Segundum, the fort at Wallsend in Newcastle-upon-Tyne in the East. Construction began in 122BC, and when finished the wall stood 10ft wide and 13ft high and was replete with forts, gateways, observation towers and a defensive ditch running in front.