For instance, if we mean to designate the rite, the term Greek Church is inaccurate, since there is really no Greek Rite properly so called, but only the Byzantine Rite.
As a matter of fact, the usual signification attached to the words extends to all those Churches with a liturgical rite differing from the Latin Rite.
Let them reject the authority of the pope or accept it, they are none the less Eastern Churches.
Thus the Russian Church, separated from Rome, is an Eastern Church; in the same way the Greek Catholics who live in Italy, and are known as Italo-Greeks, make up an Eastern Church also.
The expression is therefore the most comprehensive in use; it includes all believers who follow any of the six Eastern rites now in use: the Byzantine, Armenian, Syrian, Chaldean, Maronite, and Coptic.
What, then, do we mean when we speak of the Greek Church?
Ordinarily we take it to mean all those Churches that use the Byzantine Rite, whether they are separated from Rome or in communion with the pope, whether they are by race and speech Greek or Slavs, Rumanians, Georgians, etc.The term is, therefore, peculiarly inappropriate, though most commonly employed. In the East, when a Church is spoken of, four things must be kept distinct: the race to which the adherents of the Church belong; the speech used in their everyday life, and in their public devotions; the ecclesiastical rite used in their liturgy, and their actual belief, Catholic or non-Catholic. (5) From 1453 to the Present Time Relations with the Catholic Church, the Protestants, etc. (3) The Greek Schism; Conversion of the Slavs (ninth to eleventh century); (4) Efforts towards Reunion; the Crusades (eleventh to fifteenth century); (a) Internal Organization; (b) Hesychasm. Greek-Church History, subdivided into: (1) The First Five Centuries; (2) Decay of the Greek Churches of the East and Rise of the Byzantine Hegemony (451-847); (a) Internal Organization of the Byzantine Churches; (b) The Emperor; Relations between East and West; Liturgy.