The Greek Orthodox churches in the diaspora under the Ecumenical Patriarchate use a black double-headed eagle in a yellow field as their flag or emblem.
The eagle is depicted as clutching a sword in one claw and a globus cruciger in the other, with a crown above and between its two heads. [1]
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The flag is most widely used in Greek Orthodox Churches, monasteries, parishes, and ecclesiastical bodies. It has also been displayed in the monasteries on Mount Athos. It is also flown outside of these communities during ceremonial celebrations. [2] However, this is mostly a traditional custom rather than a written rule by the Eastern Orthodox Church. [3]
It is not surprising that all symbols of Mount Athos, especially the Byzantine double-eagle and the Holy Virgin, who is the patron of the Holy Mount, represent old Byzantine traditions. [...] The flag of Mount Athos (Fig. 1) is golden yellow bearing the black Byzantine double-headed eagle with an imperial crown. The eagle holds on its claws an orb of black with golden bands and a black....