Complex sentence: The Eastern Orthodox Church tradition, particularly jurisdictions of the Greek Orthodox Church under the direct authority of the Ecumenical Patriarch, often displays this flag, which is a Byzantine double-headed eagle on a yellow (Or) field.
Split into simpler sentences: The Eastern Orthodox Church tradition, particularly jurisdictions of the Greek Orthodox Church under the direct authority of the Ecumenical Patriarch, often displays this flag. It is a Byzantine double-headed eagle on a yellow (Or) field.