English: The Roman Empire in 117 AD during the reign of emperor Trajan. Depicted is Roman territory (purple) and Roman dependencies (pink). Roman dependencies are the Bosporan Kingdom (north) and the Caucasian kingdoms of Colchis, Iberia, and Albania (northeast). Sources: Julian Bennett, Trajan: Optimus Princeps. 1997. p 177-8 (Limes Arabicus) Virtual Karak Resource (Limes Arabicus)