Original sentence: However, the Greek Orthodox Church has never canonized him.Some Eastern Orthodox and Greek-Catholics consider Constantine XI a saint (or a  national martyr or ethnomartyr, (Greek: )
Edited sentence: After the Greek War of Independence (1821-1831), when the Greek Orthodox Church once again had freedom to act, an official act of glorification was thought to be superfluous, on account of longstanding veneration as a saint and martyr, specifically, a national martyr or ethnomartyr, (Greek: ).Eastern Orthodox and Greek-Catholics consider Constantine XI a saint, but he has not been officially recognized as such.His feast falls on 29 May.However, the erection of the statue of "Saint Constantine XI the Ethnomartyr" in the square in front of the Metropolitan Cathedral of Athens, with the formal blessing of the Church authorities, appears to be a semi-official act of recognition.One of the reasons for this was that in the centuries of Ottoman rule, any effort on the part of the Orthodox Church to officially glorify Constantine XI as a saint would have been seen as an act of rebellion, and hence decidedly ill-advised