Patriarchate of Constantinople
Helenoupolis
Vicariate of Chalcedon, Nicomedia
Bishops 3
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1815 – ca. 1826
Chrysanthos d. 1826
Bishop
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13 March 1869 – 1 August 1877
Constantios Stavrides 1833–1899
Bishop
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24 September 1972 – 2 October 1990
Athanasios Papas b. 1936
Bishop, then Metropolitan
In the order of their start dates; bishops whose dates are unknown come last. Gaps are periods the data does not yet cover.