The Roman Rig (also known as Roman Ridge, Scotland Balk, or Barber Balk) is the name given to a series of earthworks to the north east of Sheffield in South Yorkshire, England that are believed to originally have formed a single Dyke running from near Wincobank in Sheffield to Mexborough. Its purpose and date of construction are unknown. Formerly thought to have been a Roman road, modern archaeologists think that it was built either in the 1st century AD by the Brigantian tribes as a defence against the Roman invasion of Britain, or after the 5th century to defend the kingdom of Elmet from the Angles.