St. Bretannion, Bishop of Tomis in Scythia Minor.
St. Bretannion was Bishop of Tomis on the Black Sea, in present-day Romania, in the fourth century. When the Arian emperor Valens visited and tried to force his heresy on the Church, the bishop led his flock out of the cathedral rather than commune with him.
He reposed in peace and is commemorated on January 25.
Feast day
On the New Calendar, Bretannion of Tomis is commemorated on January 25. Churches on the Old (Julian) Calendar keep the feast on February 7 of the civil calendar.
Also commemorated on January 25

Publius the Ascetic
Venerable, Πούπλιος
Venerable Publius of Syria, founder of a monastery near Zeugma.

Vladimir of Kiev
Hierarch, Βλαδίμηρος Κιέβου
Hieromartyr Vladimir, Metropolitan of Kiev, first of the Russian New Martyrs.