↑In a step that was symbolically important in view of the council's prohibition of depicting Christ as a Lamb, Sergius introduced into the liturgy the chant "Lamb of God, you take away the sins of the world, have mercy on us" at the breaking of the Host during Mass, and restored the damaged facade mosaic in the atrium of Saint Peter's that depicted the Worship of the Lamb. Cfr. Ekonomou, 2007, p. 223. The Agnus Dei would have been chanted in both Greek and Latin during this period, in the same manner as the other liturgical changes of Sergius. Cfr. Ekonomou, 2007, p. 250.
↑ Frank N Magill, Alison Aves, Dictionary of World Biography (Routledge 1998 ISBN|978-1-57958041-4), vol. 2, pp. 823–825
Collins, Roger. The Arab Conquest of Spain, 710–97. Oxford: Blackwell Publishing, 1989. ISBN|0-631-15923-1
Nedungatt, George: The council of Trullo revisited: Ecumenism and the canon of the councils, dans Theological Studies, Vol.71, September 2010, pp. 651–676.
Concilium Constantinopolitanum a. 691/2 in Trullo habitum. H. Ohme (ed.) Acta conciliorum oecumenicorum, Series Secunda II: Concilium Universale Constantinopolitanum Tertium, Pars 4. ISBN|978-3-11-030853-2. Berlin/Boston Oktober 2013.
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