2015 Event Pope Francis issues an encyclical, 'Laudato Si' (Praise Be), urging action to protect Earth from pollution and climate change; the document was issued with the intention of influencing the U.N. Climate Summit later this year 1993 Event Pope John Paul II publishes encyclical Veritatis splendor 1993 Event Pope John Paul II publishes Veritatis splendor encyclical 1991 Event Pope John Paul II's encyclical on Centesimus annus 1981 Event Pope John Paul II publishes encyclical "Laborem exercens" against capitalism/marxism 1974 Event Pope Paul VI encyclical "To Honor Mary" 1968 Event Pope Paul VI, in an encyclical entitled "Humanae Vitae" (Of Human Life), declares any artificial forms of birth control prohibited 1968 Event Pope Paul VI encyclical against On regulation of birth 1967 Event Pope Paul VI publishes encyclical Sacerdotalis coelibatus 1967 Event Pope Paul VI publishes encyclical Populorum progressio 1965 Event Pope Paul VI publishes encyclical Mysterium Fidei 1964 Event Pope Paul VI publishes encyclical Ecclesiam Suam 1963 Event John XXIII encyclical On peace in truth, justice, charity and liberty 1961 Event Pope John XXIII publishes encyclical Mater et magistrate 1961 Event Pope John XXIII publishes encyclical Mater et Magistra 1959 Event Pope John XXIII publishes encyclical Princeps Pastorum 1959 Event Pope John XXIII publishes encyclical Sacerdotii nostri primordia 1959 Event Pope John XXIII 1st encyclical "On truth, unity, and peace, in charity" 1958 Event Pope Pius XII publishes his 39th and last encyclical Meminisse juvat 1957 Event Pope Pius XII encyclical On motion pictures, radio, TV 1957 Event Pope Pius XII publishes encyclical Le pelerinage De Lourdes 1957 Event Pope Pius XII publishes encyclical Invicti Athletae 1957 Event Pope Pius XII publishes encyclical Fidei Donum 1956 Event Pope Pius XII publishes encyclical Datis nuperrime 1956 Event Pope Pius XII publishes encyclical Laetamur admodum 1956 Event Pope Pius XII publishes encyclical Luctuosissimi eventus 1956 Event Pope Pius XII publishes encyclical Haurietis aquas 1955 Event Pope Pius XII encyclical on sacred music and popular music 1954 Event Pope Pius XII publishes encyclical Ad caeli Reginam 1954 Event Pope Pius XII publishes encyclical Ad Sinarum gentem 1954 Event Pope Pius XII publishes encyclical Ecclesiae fastos 1954 Event Pope Pius XII encyclical "Sacra virginitas" (On consecrated virginity) 1953 Event Pope Pius XII publishes encyclical Fulgeno corona 1953 Event Pope Pius XII publishes encyclical Doctor Mellifluus 1952 Event Pope Pius XII publishes encyclical Orientales Ecclesias 1951 Event Pope Pius XII publishes encyclical Ingruentium Malorum 1951 Event Pope Pius XII publishes encyclical Sempiternus Rex 1951 Event Pope Pius XII publishes encyclical Evangelii praecones 1951 Event Pope Pius XII publishes encyclical Evangelii praecones 1950 Event Pope Pius XII publishes encyclical Mirabile illud 1950 Event Pope Pius XII publishes encyclical Humani generis 1950 Event Pope Pius XII publishes encyclical Summi maeroris 1950 Event Pope Pius XII encyclical "On combating atheistic propaganda" 1949 Event Pope Pius XII publishes encyclical Redemptoris nostri 1948 Event Pope Pius XII publishes encyclical In Multiplicibus Curis 1948 Event Pope Pius XII publishes encyclical Auspicia quaedam 1947 Event Pope Pius XII publishes encyclical Optissima Pax 1947 Event Pope Pius XII publishes encyclical Mediator Dei 1947 Event Pope Pius XII publishes encyclical Fulgens radiatur 1946 Event Pope Pius XII publishes encyclical Quemadmodum 1945 Event Pope Pius XII encyclical Orientals omnes, about Rutheense church 1945 Event Pope Pius XII publishes encyclical Communium interpretes dolorum 1944 Event Pope Pius XII publishes encyclical Orientals Ecclesiae 1943 Event Pope Pius XII encyclical on Divine spirit 1943 Event Pope Pius XII encyclical Mystic Corporis (mystic body of Christ) 1939 Event Pope Pius XII publishes encyclical Sertum laetitiae 1939 Event Pope Pius XII publishes his 1st encyclical Summi pontificatus 1937 Event Pope Pius XI publishes encyclical Divini redemptoris against communism 1936 Event Pope Pius XI encyclical to U.S. bishops "On motion pictures" 1935 Event Pope Pius XI publishes encyclical Ad Catholici Sacerdotii 1933 Event Pope Pius XI encyclical "On oppression of the Church in Spain" 1931 Event Pope Pius XI encyclical On economic crisis 1931 Event Pope Pius XI encyclical on Nun abbiamo bisogno Mussolini 1931 Event Pope Pius XI publishes encyclical Quadragesimo anno 1930 Event Pontifical encyclical Casti connubii against mixed marriages 1929 Event Pope Pius XI publishes encyclical Divini illius magistri 1928 Event Pope Pius XI publishes encyclical Mortalium animos (against oecumene) 1926 Event Pope Pius XI encyclical On persecution of Church in Mexico 1925 Event Pope Pius XI publishes encyclical Quas Primas 1924 Event Pope Pius XI's encyclical Maximam gravissimamque 1922 Event Pope Pius XI pleas for peace: encyclical Ubi arcano 1921 Event Pope Benedictus XV publishes encyclical Alcohol Paraclitus 1921 Event Pope Benedict XV encyclical "On Dante" 1920 Event Pope Benedictus XV publishes encyclical Pacem Dei 1919 Event Pope Benedictus XV publishes encyclical In hac tanta 1914 Event Pope Benedictus Xv's encyclical Ad beatissimi, against integrity 1912 Event Pius X encyclical Singular quadam, against interconfess unions 1912 Event St. Pius X encyclical "On Indians of South America" 1910 Event Pope's encyclical on Editae Saepe, against church reformers 1907 Event Pius X publishes encyclical Pasceni dominici gregis (anti-modernism) 1906 Event St. Pius X encyclical "On the Mariavites or Mystic Priests of Poland" 1906 Event Pope encyclical against separation of church and state 1905 Event Pope Pius X publishes encyclical Vehementer nos 1902 Event Pope Leo XIII encyclical "On Church in US" 1901 Event Pope Leo XIII publishes encyclical Graves De Communi Re 1900 Event Pope Leo XIII encyclical to Greek-Melkite rite 1893 Event Pope Leo XIII publishes encyclical Providentissimus Deus 1891 Event Pope Leo XIII's encyclical "Rerum novarum" published 1891 Event Pope Leo XIII publishes encyclical Rerum novarum 1890 Event Pope Leo XIII encyclical On slavery in missions 1890 Event Pope Leo XIII publishes encyclical Sapientiae Christianae 1888 Event Pope Leo XIII publishes encyclical Libertas 1885 Event Pope Leo XIII publishes encyclical Immortale Dei 1884 Event Pope Leo XIII encyclical "On Freemasonry" 1881 Event Pope Leo XIII publishes encyclical Diuturnum illud 1880 Event Pope Leo XIII publishes encyclical Arcanum about Christian marriage 1879 Event Pope Leo XIII publishes encyclical Aeterni Patris 1878 Event Pope Leo XIII publishes encyclical Quod apostolici muneris (socialism) 1878 Event Pope Leo XIII publishes encyclical Inscrutabili 1874 Event Pope Pius IX encyclical "On Greek-Ruthenian rite" 1873 Event Pope Pius IX encyclical "On the Church in Armenia" 1864 Event Pope Pius IX publishes encyclical Quanta cura ("Syllabus errorum") 1863 Event Pope Pius IX encyclical On persecution in New Grenada 1854 Event Pope Pius IX encyclical "On persecution of Armenians" 1847 Event Pope Pius IX encyclical "On aid for Ireland" 1834 Event Pope Gregory XVI's encyclical "Singulari nos" published 1832 Event Gregory XVI encyclical On liberalism and religious indifferentism 1775 Event Pope Pius VI encyclical on the problems of the pontificate 1741 Event Pope Benedict XIV encyclical forbidding traffic in alms
