Castinus of Byzantium

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Castinus of Byzantium
Bishop of Byzantium
Installed 230
Term ended 237
Personal details
Denomination Eastern Orthodox Church

Castinus I (? – 237) was Bishop of Byzantium the period 230–237. In some catalogues he appears as Constantine.

He descended from Rome, and he was senator and not a Christian. He converted to Christianity, being baptised by the bishop of Argyropolis, Cyrillianus. Then he gave his fortune to the poor and was devoted to the Church. He was bishop of Byzantium from 230 to 237. Until his tenure, the cathedral was near the sea in the area of present Galata. He built the first church in Byzantium, to honour Saint Euphemia. Nicephorus Callistus refers to him in his works as Constantine.

His memory is revered on January 25.


Titles of the Great Christian Church
Cyriacus I
Bishop of Byzantium
Eugenius I