Euthymius Zigabenus

Euthymius Zigabenus or Zigadenus or Zygadenus was a 12th-century monk and commentator on the Bible. He was a friend of the Byzantine emperor Alexius I Comnenus, for whom he wrote a lengthy work on heresies, Panoplia Dogmatica or Panoply of Doctrine. This began in the apostolic era and continued down to the Bogomils, some of whom he personally examined. The entry on the Bogomils is our main source of information about them. Nothing is known about his life.