21. Turning now to the Greeks, We consider first the Italian Greeks. These are entirely subject to the jurisdiction of the Latin bishop in whose diocese they live, in accordance with constitution 74, Romanus Pontifex, of Our predecessor, Pope Pius IV. This is to be found in volume two of the Bullar. Rom. and We have discussed it at length in Our treatise De Synodo Dioecesana, bk. 2, chap. 12, of the most recent Roman edition. Therefore these Italian Greek priests, in offering the sacrifice of the Mass, are required to follow the Latin practice and commemorate the Roman Pontiff and the local bishop. They should never commemorate eastern bishops or patriarchs even if they are Catholic, since these possess no jurisdiction in Italy and the adjacent islands, as has been discussed in Our constitution Etsi Pastoralis (Bullarium, vol. 1, const. 57, sect. 9 no. 4).

Of course in the Dictatus of Pope St. Gregory VII (can. 10) we find the dictum: "That the name of the Pope alone be pronounced in the church." This Dictatus is included in the collections of the councils (Royal Parisian, vol. 26; Labbe, vol. 6, pt. 1). Still We are well aware that there is a vigorous debate among scholars as to whether this is an authentic work of the holy pontiff or rather a forgery. Indeed Fr. Mabillon in his treatise De Studiis Monasticis has ranked this among the more difficult questions which professors of Church history can engage in solving. But laying aside this problem also-as to whether the Dictatus Papae is an authentic work of St. Gregory VII-the real and pertinent meaning of the Canon quoted is not that in the Latin Church the name of the diocesan bishop be removed from the Canon of the Mass, but that the name of Oriental Patriarchs should not be included there.

The Patriarchs indeed professed their agreement with the condition, that the name of the Roman Pontiff should be replaced in the Liturgy and that prayers should be offered for him in all the churches of the east, if in turn the Pope would consent to their names being pronounced in the Canon of the Mass by Latin priests of the Roman Church and of the other churches in the Patriarchate of Rome. Lupus wisely notes: "Purposing to abandon his schism, Michael (Cerularius, Patriarch of Constantinople) tried to have his name inscribed on the Roman tablets and he promised to restore the name of the Pope to the tablets of all of his churches. But Leo (Pope Leo IX) would not consent: for the reciprocal pronouncement of the names of Patriarchs was practiced only among the equal sister sees of the eastern patriarchs, but never by the Roman see. For this see is not only sister but also mother and head of the eastern sees and so has never pronounced any other name than the bishops" (ad Concilia, pt. 4, p. 437, Brussels edition). He continues in this way on the following page: "The names of the eastern patriarchs have never been pronounced by the Roman church nor for that matter by any Latin church."