Basil of Amasea (Basileus or Basilius) was a fourth-century Christian bishop and martyr. In St. Jerome's Latin version of the Chronicle of Eusebius the statement occurs under the 275th Olympiad (321-324) that Basileus, Bishop of Amasea in Pontus, suffered martyrdom in the reign of Licinius. Among the signatures of the bishops who attended the Council of Ancyra and (314) is to be found the name of Basileus of Amasea. Eusebius also relates that in the time of Licinius Christians were treated with great cruelty, especially in Amasea and the other cities of Pontus, and that, in particular, the governor inflicted upon several bishops the ordinary punishments of evildoers.