Saint Eustathius the Confessor, Bishop of Bithynia, was already at the beginning of his spiritual struggle a pious monk, meek and wise, filled with great faith and love for his neighbor. For his virtuous life he was made bishop of the city of Bithynia (a Roman province in northwest Asia Minor) and for many years he guided his flock, giving them an example of virtuous life and perfection.
During the Iconoclast heresy, Saint Eustathius boldly came out against the heretics and defended the veneration of holy icons. Iconoclasts denounced him to the emperor, and the saint suffered imprisonment and fierce beatings. Finally, they deprived Saint Eustathius of his See and sent him to prison.
The holy confessor died in exile during the ninth century, after suffering insults, deprivation, hunger, and want for three years.