Kyrie eleison

Definition and stakes

C. F. Abdy Williams Bach

The words Kyrie eleison are sung in a massive five part adagio with independent orchestral parts, coming to a full close at the end of the fourth bar. Here an instrumental “largo ed un poco piano” commences and continues for twenty-five bars; it foreshadows the vocal fugue, of which the following is the impressive subject:
After this fugue has been worked at considerable length there is an instrumental interlude, and it recommences, the bass leading off with the subject in the tonic.
Source: Gutenberg

Portrait of Adrian Fortescue Adrian Fortescue Catholic Encyclopedia (1913)

The deacon reads out a litany for various causes (ἡ καθολική) , to each petition of which the people answer "Kyrie eleison", and the bishop sums up their prayers in a collect. Then follows the kiss of peace. St. Athanasius appears to place the offering of the gifts at this point (Probst, Lit. des IV. Jahrh., iii) . The diptychs are read, followed by another collect and a prayer for the people. The bishop washes his hands and begins the Eucharistic Prayer (of which our Preface is the first part) . The opening of the Eucharistic Prayer has always been very long in the Egyptian Liturgy. St.
Source: Wikisource

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