Bishop of Smyrna
According to the Orthodox calendar, Bucolus was a follower of the Apostle and Evangelist John the Theologian and served as bishop of Smyrna in Asia Minor. Through divine grace he brought many pagans to Christianity through baptism and provided spiritual guidance to his people while defending the faith.
Smyrna (modern Izmir, Turkey) was an early center of Christianity. By around AD 93 a Christian community already existed there under episcopal leadership, and the city's church received commendation from Saint John in the Book of Revelation (1:11; 2:8–11).