The patriarch of Constantinople (modern-day Istanbul) is known as the ecumenical patriarch; he is regarded as “the first among equals.” Capitalize this title if used before a name, but not otherwise.
In the Eastern Catholic and Orthodox churches, a metropolitan heads an ecclesiastical province, a metropolitan see, and ranks below the patriarch. Capitalize metropolitan when used as a title before a name.
Eastern Orthodox archbishops and bishops frequently follow a monastic tradition in which they are known only by a first name. In those cases, repeat the title before the name in subsequent references. Archbishop may be replaced by the Most Rev. on first reference.
Use the Rev. before the name of a priest on first reference; on second reference use only his last name.
