Ecclesiam Dei – Encyclical Letter of the Supreme Pontiff On the Occassion of the 300th Anniversary of the Martyrdom of St. Joshaphat, Archbishop of Polotsk (Pius XI – Nov. 12, 1923)
Ecclesiam Dei – Encyclical Letter of the Supreme Pontiff On the Occasion of the 300th Anniversary of the Martyrdom of St. Joshaphat, Archbishop of Polotsk (Pius XI – Nov. 12, 1923)
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