==Notes====References==* Ekonomou, Andrew J., "Byzantine Rome and the Greek Popes: Eastern Influences on Rome and the Papacy from Gregory the Great to Zacharias, A.D. 590-752" (2007)* Levillain, Philippe, "The Papacy: Gaius-Proxies", Routledge (2002)* Treadgold, Warren, "A History of the Byzantine State and Society" (1997)* Mann, Horace K., "The Lives of the Popes in the Early Middle Ages, Vol.
* Первое послание святого отца нашего Григория, папы римского, к императору Льву исаврянину о святых иконах*Ekonomou, Andrew J., Byzantine Rome and the Greek Popes: Eastern Influences on Rome and the Papacy from Gregory the Great to Zacharias, A.D. 590-752 (2007)*Levillain, Philippe, The Papacy: Gaius-Proxies, Routledge (2002)*Treadgold, Warren, A History of the Byzantine State and Society (1997)*Mann, Horace K., The Lives of the Popes in the Early Middle Ages, Vol.