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ResidenceNicomedia, Roman Empire
(modern-day İzmit, Turkey)
Venerated in
  • November 2 (Catholic Church)
  • August 22 (Orthodox Church)

Saint Agathonicus was a 3rd-century citizen of Nicomedia.[1] While living in Greece, he taught the Greeks about Christianity. Meanwhile, the imperial governor began persecuting Christians, following the orders of Emperor Maximian.[2] In this persecution, Agathonicus' companion Zoticus was seized in Carpe, and his followers were crucified. He was sent to Nicomedia, where Agathonicus and his companions Princeps, Theoprepius, Acyndinus, Severian, Zeno, along with many others, were then taken to Byzantium.[3] On this journey, many of the companions died from exhaustion and abuse, and the others were killed in Chalcedon. The survivors were taken to Thrace in Selymbria, where, after being tortured in front of the Greek Emperor, were beheaded.

Their feast day is celebrated on November 2 in the Catholic Church. In the Eastern Orthodox Church their feast day is August 22.


  1. ^ "Lives of all saints commemorated on August 22". Orthodox Church in America. Retrieved 20 December 2012.
  2. ^ Pétridès, Sophrone. "Selymbria." The Catholic Encyclopedia. Vol. 13. New York: Robert Appleton Company, 1912. 19 Dec. 2012
  3. ^ Brady, John. "Orthodox Saints for August". God is Wonderful in His Works: Orthodox Resources. Retrieved 20 December 2012.