The Orthodox Archdiocese of Beirut is one of the nineteen archdioceses of the Church of Antioch. The establishment of the Archdiocese of Beirut is attributed by tradition to the Apostle Quartos, one of the Seventy. The area within the archdiocese has varied through the centuries as the Orthodox population had changed. At different times the area of Mount Lebanon has been part of the Archdiocese of Beirut.