The Holy Trinity CathedralCathedral of the Holy Trinity in Athens () also called Greek-Catholic Cathedral of Athens is a Greek Byzantine Catholic cathedral in Athens, Greece.

It functions as the seat of the Greek Catholic Apostolic Exarchate of Greece (Exarchatus Apostolicus Graeciae) that was created on June 11, 1932, by the then Pope, Pius XI, and follows the Byzantine Rite.

It was most recently under the pastoral responsibility of Bishop Manuel Nin.

See also Greek Byzantine Catholic Church Roman Catholicism in Greece Holy Trinity

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