Hadrian’s Wall was an imposing stone fortification, built by the Roman emperor Hadrian in the first half of the 2nd century, which marked the boundary between the occupied Roman province of Britain and Caledonia. This fortification divided the island into two parts. The name is still sometimes used today to indicate the border between Scotland and England, even if the wall does not follow the current border. The wall represented the northernmost border of the Roman Empire in Britain for much of the period of Roman rule over these lands; it was also the most heavily fortified border of the entire empire. Hadrian’s Wall runs 117km (equal to 80 Roman miles) from Wallsend on the River Tyne to the Solway Firth coast.