Boniface VIII against Ecumenism and the conciliar "Church of Christ"
(Boniface VIII, Bull Unam Sanctam, in Giorgio Pallieri - Giulio Vismara, Acta Pontificia Juris Gentium, Milan: Società Editrice Vita e Pensiero, 1946, p. 8, n. 27)
Gregory XVI against Ecumenism & Religious Indifferentism
(Gregory XVI, Encyclical Mirari vos, August 15, 1832, Recueil des allocutions, p. 163)
Pius IX against Ecumenism & Religious Indifferentism
(Pius IX, Encyclical Qui pluribus, November 9, 1846, Recueil des allocutions, p. 181)
Leo XIII: Those separated from the Catholic Church are dead members
(Leo XIII, Encyclical Satis cognitum, of June 29, 1896 (Petrópolis: Vozes, 1960), n. 10)
Pius XI sternly condemns the early interfaith endeavors
(Pius XI, Encyclical Mortalium animos, of January 6, 1928 Paris: Bonne Presse, 1928, vol. 4, pp. 64-5)
(Boniface VIII, Bull Unam Sanctam, in Giorgio Pallieri - Giulio Vismara, Acta Pontificia Juris Gentium, Milan: Società Editrice Vita e Pensiero, 1946, p. 8, n. 27)
Gregory XVI against Ecumenism & Religious Indifferentism
(Gregory XVI, Encyclical Mirari vos, August 15, 1832, Recueil des allocutions, p. 163)
Pius IX against Ecumenism & Religious Indifferentism
(Pius IX, Encyclical Qui pluribus, November 9, 1846, Recueil des allocutions, p. 181)
Leo XIII: Those separated from the Catholic Church are dead members
(Leo XIII, Encyclical Satis cognitum, of June 29, 1896 (Petrópolis: Vozes, 1960), n. 10)
Pius XI sternly condemns the early interfaith endeavors
(Pius XI, Encyclical Mortalium animos, of January 6, 1928 Paris: Bonne Presse, 1928, vol. 4, pp. 64-5)

