Trisagion

TRISAGION “Holy God, Holy Mighty, Holy Immortal . . . have mercy upon us.” The Trisagion was introduced into the Byzantine liturgy by Proclus of Cyzicus, who succeeded Nestorius as Bishop of Constantinople (431-446 a.d.). However, a papyrus from the fourth century preserved in the collection of the University of Strasbourg includes a Trisagion in …

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