Phyletism (from phyli — race, tribe) is the principle of nationalities applied in the ecclesiastical domain: in other words, the confusion between Church and nation. The term ethnophyletismos designates the idea that a local autocephalous Church should be based not on a local [ecclesial] criterion, but on an ethnophyletist, national or linguistic one. It was used at the Holy and Great ["Meizon" --"enlarged"] pan-Orthodox Synod in Constantinople on the 10th of September 1872 to qualify “phyletist (religious) nationalism,” which was condemned as a modern ecclesial heresy: the Church should not be confused with the destiny of a single nation or a single race.