Venerable Andronikos, ascetic of Atroa in Bithynia.
St. Andronikos was a monk of Atroa on the slopes of the Bithynian Olympus, a great center of monastic life in the Byzantine period. He lived in asceticism and prayer and reposed in peace.
He is commemorated on September 12.
Feast day
On the New Calendar, Andronikos of Atroa is commemorated on September 12. Churches on the Old (Julian) Calendar keep the feast on September 25 of the civil calendar.
Also commemorated on September 12

Julian of Ancyra and the 40 with him
Hierarch, Ιουλιανός ο Πρεσβύτερος
Hieromartyr Julian, presbyter of Ancyra in Galatia, and forty martyrs with him.
Macedonius, Theodoulos and Tatian
Martyr, Μακεδόνιος, Θεόδουλος και Τατιανός
Holy Martyrs Macedonius, Theodoulos and Tatian of Phrygia.