Hadrian's Wall (Hadrians Wall), located on the British island of Britain, was built by the Roman Empire during its occupation of Britain, and has been the northwest border of the Roman Empire from its completion to its abandonment. The Great Wall of Hadrian includes the wall, watchtower, fort and castle, which fully represents the edge system of the Roman Empire. Hadrian's Wall, together with the Antony and German Wall, formed the ancient Roman Great Wall.