Others, including 20th-century theologians Metropolitan Hierotheos (Vlachos) of Naupactus, Fr. John S. Romanides, and Fr. George Metallinos (all of whom refer repeatedly to the "Eighth and Ninth Ecumenical Councils"), Fr. George Dragas, and the 1848 Encyclical of the Eastern Patriarchs (which refers explicitly to the "Eighth Ecumenical Council" and was signed by the patriarchs of Constantinople, Jerusalem, Antioch, and Alexandria as well as the Holy Synods of the first three), regard other synods beyond the Seventh Ecumenical Council as being ecumenical.