Hadrian's Wall

Hadrian’s Wall, continuous Roman defensive barrier that guarded the northwestern frontier of the province of Britain from barbarian invaders. The wall extended from coast to coast across the width of northern Britain; it ran for 73 miles (118 km) from Wallsend (Segedunum) on the River Tyne in the east to Bowness on the Solway Firth in the west.  

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An altar set up between AD 222 and 235 by Quintus Petronius Urbicus, commandant of the Vindolanda garrison [http://vindolanda.csad.ox.ac.uk/reference/names.shtml]