^Diehl, Charles (1923). "1: Leo III and the Isaurian Dynasty (717-802)". Dalam Tanner, J. R.; Previté-Orton, C. W.; Brooke, Z. N.The Cambridge Medieval History. IV: The Eastern Roman Empire (717-1453). Cambridge: Cambridge University Press. hlm. 21. ISBN9785872870395. Diakses tanggal 2016-02-01. [...] Tarasius [...] skilfully put forward the project of an Ecumenical Council which should restore peace and unity to the Christian world. The Empress [...] summoned the prelates of Christendom to Constantinople for the spring of 786. [...] Finally the Council was convoked at Nicaea in Bithynia; it was opened in the presence of the papal legates on 24 September 787. This was the seventh Ecumenical Council.