In 1826, Catholic Jesuit priest John Marangos began a mission among the Orthodox Christians of Constantinople, where he managed the construction of a small community.

As a result of the conflict between Greece and Turkey after the First World War, the Greek Catholics of Malgara and of the neighbouring village of Daudeli moved to Giannitsa in Macedonia, where today lives a sizeable community, and many of those who lived in Istanbul emigrated or fled to Athens, one being the bishop who had succeeded to the position of exarch, and the religious institute of the Sisters of the Pammakaristos, founded in 1920.

Continued emigration and anti-Greek nationalist incidents by Turks, such as the Istanbul Pogrom, extremely reduced the number of the Greek Catholics in Turkey.

A priest based in Athens, Archimandrite Athanasios Armaos, visits Cargèse several times a year to conduct services in the Greek church.

[3] Notable Greek Byzantine, or Eastern, Catholics (also called Uniates for favouring the Union of the Churches) include: Related institutions outside of Greece: Historical connections: Other: