Ugolini, Romano Ungern-Sternberg, Jürgen von Ungern-Sternberg, Wolfgang von Unterburger, Klaus Urbach, Otto Urban viii (Maffeo Vincenzo Barberini), Pope Ustorf, Werner

In: Volume 1 Dawn of Ecumenism | Part II. Prehistory: The Challenges of Modernity previous chapter 1 Introduction In 1856, when Fr. Jean-Xavier (Ivan Sergeyevich) Gagarin, a Russian Orthodox who had converted to Catholicism and become a Jesuit, chose primary sources for the appendices of his book, La Russie sera-t-elle catholique?, he could only publish old texts: the decree of union of the Council of Florence (1439), Clement viii’s bull on the reunion of Russian bishops (1595), and Benedict xiv’s encyclical to missionaries assigned to the East, Allatae sunt (1755).1 The situation w…