- Joannicius the Great
- Joannicus of Olympus
- Joannicus of Uludag
A friend who had become a monk led him to the faith. At age 40, Joannicus retired from the military and the world, becoming a hermit on Mount Olympus, Bithynia (modern Uludag, Turkey). He developed a reputation for holiness, and had to move several times to escape would-be spiritual students. Monk at Eraste.
A one-time supporter of iconoclasm, he fought it and defended orthodox teachings in the iconoclast movement of 818. He tried to be a peacemaker, arguing that the orthodox should try to understand and reunite with iconoclast priests.
Advisor to Saint Theodore the Studite and Saint Methodius of Constantinople. Prophet and miracle worker. His prophesied the restoration of images to churches, a prophesy fulfilled by Theodora, wife of emporer Theophilus. Friend of Saint Peter of Atroa; at the time of Saint Peter‘s death, he had a vision of Peter being lifted up a mountain into heaven. Highly venerated by the Greeks.
- c.754 at Bithynia (in modern Turkey)
My hope is the Father, my refuge is the Son, my shelter is the Holy Spirit, O Holy Trinity, Glory to You. – Prayer of Saint Joannicus
With the rivers of your tears, you have made the barren desert fertile. Through sighs of sorrow from deep within you, your labors have borne fruit a hundred-fold. By your miracles you have become a light, shining upon the world. O Ioninicus, our Holy Father, pray to Christ our God, to save our souls. – Apolytikion in the Fourth Tone
We the faithful on this day all come together, righteous Joannicius, to keep thy sacred memory; and we beseech thee to intercede that we may all find great mercy with Christ our Lord. – Kontakion in the Fourth Tone
- “Saint Joannicus of Mount Olympus“. CatholicSaints.Info. 6 December 2009. Web. 6 October 2015. <>