Pope Benedict XV, born Giacomo Paolo Giovanni Battista della Chiesa, was head of the Catholic Church from 1914 until his death in 1922. His pontificate was largely overshadowed by World War I and its political, social, and humanitarian consequences in Europe.
An encyclical was originally a circular letter sent to all the churches of a particular area in the ancient Roman Church. At that time, the word could be used for a letter sent out by any bishop. The word comes from the Late Latin encyclios.
Mystici corporis Christi is a papal encyclical issued by Pope Pius XII on 29 June 1943 during World War II. It is principally remembered for its statement that the Mystical Body of Christ is the Catholic Church, a claim later repeated by Pius XII in Humani generis (1950) in response to dissension. According to Mystici corporis, to be truly a member of the Mystical Body one must be a member of the Catholic Church. Other Christians who erred in good faith could be unsuspectingly united to the Mystical Body by an unconscious desire and longing.
Summi Pontificatus is an encyclical of Pope Pius XII published on 20 October 1939. The encyclical is subtitled "on the unity of human society". It was the first encyclical of Pius XII and was seen as setting "a tone" for his papacy. It critiques major errors at the time, such as ideologies of racism, cultural superiority and the totalitarian state. It also sets the theological framework for future encyclical letters, such as Mystici corporis Christi (1943). The encyclical laments the destruction of Poland, denounces the Molotov-Ribbentrop Pact, and calls for a restoration of independent Poland.
Mediator Dei, a papal encyclical, was issued by Pope Pius XII on 20 November 1947. It was the first encyclical devoted entirely to liturgy.
Anni sacri issued on the twelfth anniversary of his coronation, is an encyclical of Pope Pius XII on a program combating atheism.
Datis nuperrime is an encyclical of Pope Pius XII dated 5 November 1956 concerning the Soviet invasion of Hungary to suppress the Hungarian Revolution of 1956. This is a second encyclical protesting the oppression of the Hungarian people. Pope Pius, as in his previous protests, does not mention the Soviet Union by name.
Auspicia quaedam is an encyclical of Pope Pius XII on worldwide public prayers to the Virgin Mary for World peace and the solution of the problem of Palestine, given at Rome at St. Peter's, the first day of May of the year 1948, the tenth of his Pontificate
Orientales ecclesias is an encyclical of Pope Pius XII concerning the persecution of the Eastern Catholic Churches and describing the desperate situation of the faithful in Bulgaria.
Pope Pius XII and Russia describes relations of the Vatican with the Soviet Union, Russia, the Eastern Orthodox Church, and the Eastern Catholic Churches resulting in the eradication of the Church in most parts of the Soviet Union during the Stalinist era. Most persecutions of the Church occurred during the pontificate of Pope Pius XII.
Persecutions against the Catholic Church took place during the papacy of Pope Pius XII (1939–1958). Pius' reign coincided with World War II (1939–1945), followed by the commencement of the Cold War and the accelerating European decolonisation. During his papacy, the Catholic Church faced persecution under Fascist and Communist governments.
Ad Caeli Reginam is an encyclical of Pope Pius XII, given at Rome, from St. Peter's Basilica, on the feast of the Maternity of the Blessed Virgin Mary, the eleventh day of October, 1954, in the sixteenth year of his Pontificate. The encyclical is an important element of the Mariology of Pope Pius XII. It established the feast Queenship of Mary.
Ingruentium malorum is an encyclical of Pope Pius XII on reciting the rosary, issued on September 15, 1951, the Feast of the Seven Sorrows of the Virgin Mary. "It is an appeal for an intensification of the traditional October Rosary devotions, making a particular recommendation for the family recitation of the Rosary, begging Our Lady to obtain peace for individuals, for families, for peoples, for nations, and for the Church throughout the world."
The Mariology of the popes is the theological study of the influence that the popes have had on the development, formulation and transformation of the Roman Catholic Church's doctrines and devotions relating to the Blessed Virgin Mary.
Communium interpretes dolorum is an encyclical by Pope Pius XII at the ending of World War II in Europe, appealing for prayers for peace during May, given at Rome, at St. Peter's on Sunday 15 April 1945, in the seventh year of his pontificate.
Le pèlerinage de Lourdes is the only encyclical of Pope Pius XII issued in French. It includes warnings against materialism on the centenary of the apparitions at Lourdes. It was given at Rome, from St. Peter's Basilica, on the feast of the Visitation of the Most Holy Virgin, July 2, 1957, the nineteenth year of his pontificate.
Eastern Catholic victims of Soviet persecutions include bishops and others among the tens of thousands of victims of Soviet persecutions from 1918 to approximately 1980, under the state ideology of Marxist–Leninist atheism.
The relations between Pope Pius XII and Judaism have long been controversial, especially those questions that surround Pope Pius XII and the Holocaust. Other issues involve Pius's Jewish friendships and his attitude towards the new state of Israel.
The Roman Catholic Church in the 20th century had to respond to the challenge of increasing secularization of Western society and persecution resulting from great social unrest and revolutions in several countries. It instituted many reforms, particularly in the 1970s under the Vatican II Council, in order to modernize practices and positions. In this period, Catholic missionaries in the Far East worked to improve education and health care, while evangelizing peoples and attracting numerous followers in China, Taiwan, Korea, and Japan.
