Julius Asclepiodotus

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For others of the same name, see Asclepiodotus

Julius Asclepiodotus was a Roman praetorian prefect who served under the emperors Aurelian, Probus and Diocletian[1] and was consul in 292. In 296 he assisted the western Caesar Constantius Chlorus in re-establishing Roman rule in Britain following the illegal rules of Carausius and Allectus.

Carausius had seized control of Britain and northern Gaul in 286, but when Constantius recovered his Gallic territories in 293, he was assassinated by his subordinate Allectus, who controlled Britain until 296, when Constantius staged an invasion to retake the island. While Constantius sailed from Boulogne, Asclepiodotus took a section of the fleet and the legions from Le Havre, slipping past Allectus's fleet at the Isle of Wight under cover of fog, and landed presumably in the vicinity of Southampton or Chichester, where he burned his ships. Allectus attempted to retreat from the coast but was cut off by Constantius's forces and defeated. Some of Constantius's troops, who had been separated from the main body by the fog during the channel crossing, caught up with the remnants of Allectus's men at London and massacred them.[2]

Asclepiodotus appears in medieval British legend as a native king of Britain. Geoffrey of Monmouth's Historia Regum Britanniae (1136) portrays him as a duke of Cornwall who is raised to the kingship in opposition to Allectus, a Roman who oppressed the people of Britain.[3] He defeats and kills Allectus near London, and besieges the rest of his forces in the city. The Romans eventually surrender on condition of safe conduct out of Britain, which Asclepiodotus is willing to grant; but his allies the Venedoti attack them, decapitate them and throw their heads into a nearby river called Gallobroc. In the 1860s, Augustus Pitt Rivers dug up a large number of human skulls, and almost no other bones, from the bed of the river Walbrook in London.[4] Asclepiodotus is then officially crowned king, and rules justly for ten years. However, his rule is contemporary with the persecutions of Christians under Diocletian, and Geoffrey places the martyrdom of Saint Alban at this time. In response to these atrocities, Coel, duke of Colchester, leads a revolt against him, kills him, and takes his crown.


  1. Historia Augusta: Probus 22; Aurelian 44
  2. Eutropius, Abridgment of Roman History 9.22; Aurelius Victor, Liber de Caesaribus 39.42; Panegyric of Constantius 6-17; Orosius, Seven Books of Histories Against the Pagans 7.25; Bede, Historia ecclesiastica gentis Anglorum 1.6
  3. Geoffrey of Monmouth, Historia Regum Britanniae 5.4-6
  4. Lewis Thorpe, The History of the Kings of Britain, Penguin, 1966, p. 19)