The term Tetrarchy (Greek: "leadership o fower [fowk]") describes ony furm o govrenment whaur pouer is dividit amang fower individuals, but in modren uisage uisually refers tae the seestem institutit bi Roman Emperor Diocletian in 293, markin the end o the Crisis o the Third Century an the recovery o the Roman Empire. This Tetrarchy lastit till c. 313, when internecine conflict eliminatit maist o the claimants tae pouer, leavin Constantine in the East an Licinius in the Wast.