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Title: Encyclical  
Author: World Heritage Encyclopedia
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Subject: Populorum progressio, Catholic Church and evolution, Centesimus annus, Ecclesia de Eucharistia, Fides et Ratio
Collection: Christian Genres, Papal Encyclicals
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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 Late Latin encyclicus (from Latin encyclius, a Latinization of Greek ἐγκύκλιος enkyklios meaning "circular", "in a circle", or "all-round", also part of the origin of the word encyclopedia).

The term has been used by Catholics, Anglicans and the Eastern Orthodox.


  • Catholic usage 1
    • Papal use of encyclicals 1.1
    • Modern encyclicals by pope 1.2
  • Anglican usage 2
    • Important Anglican encyclicals 2.1
  • Important Eastern Orthodox encyclicals 3
  • References 4
    • Footnotes 4.1
    • Sources 4.2
  • Internal links 5

Catholic usage

For the modern Catholic Church, a Papal encyclical is a kind of letter concerning Catholic doctrine sent by the Pope addressed to bishops, patriarchs, primates, and archbishops who are in communion with the Holy See. The form of the address can vary widely, and may concern bishops in a particular area, or designate a wider audience. Papal encyclicals usually take the form of a papal brief due to their more personal nature as opposed to the formal papal bull.

Although the term "encyclical" originally simply meant a circulating letter, it acquired a more specific meaning within the context of the Catholic Church. In 1740, Pope Benedict XIV wrote a letter titled "Ubi Primum", which is generally regarded as the first modern-sense encyclical. The term is now used almost exclusively for a kind of letter sent out by the Pope. Encyclicals are usually written in the Latin language, and the title of the encyclical is usually taken from its first few words (its incipit).

Papal use of encyclicals

Within Catholicism in recent times, an encyclical is generally used for significant issues, and is second in importance only to the highest ranking document now issued by popes, an Apostolic Constitution. However, the designation encyclical does not always denote such a degree of significance. The archives at the Vatican website currently classify certain encyclicals as Apostolic Exhortations. This informal term generally indicates documents with a broader audience than the bishops alone.

Pope Pius XII held that Papal Encyclicals, even when they are not of ordinary magisterium, can nonetheless be sufficiently authoritative to end theological debate on a particular question:

It is not to be thought that what is set down in Encyclical letters does not demand assent in itself, because in this the popes do not exercise the supreme power of their magisterium. For these matters are taught by the ordinary magisterium, regarding which the following is pertinent: "He who heareth you, heareth Me." (Luke 10:16); and usually what is set forth and inculcated in Encyclical Letters, already pertains to Catholic doctrine. But if the Supreme Pontiffs in their acts, after due consideration, express an opinion on a hitherto controversial matter, it is clear to all that this matter, according to the mind and will of the same Pontiffs, cannot any longer be considered a question of free discussion among theologians.

Encyclicals indicate high Papal priority for an issue at a given time. Pontiffs define when, and under which circumstances, encyclicals should be issued. They may choose to issue an apostolic constitution, bull, encyclical, apostolic letter or give a papal speech. Popes have differed on the use of encyclicals: on the issue of birth control and contraception, Pope Pius XI issued the encyclical Casti connubii, while Pope Pius XII gave a speech to midwives and the medical profession, clarifying the position of the Church on the issue.[1] Pope Paul VI published an encyclical Humanae vitae on the same topic. On matters of war and peace, Pope Pius XII issued ten encyclicals, mostly after 1945, three of them protesting the Soviet invasion of Hungary in order to crack down on the Hungarian Revolution in 1956: Datis nuperrime, Sertum laetitiae and Luctuosissimi eventus. Pope Paul VI spoke about the war in Vietnam and Pope John Paul II, issued a protest against the war in Iraq using the medium of speeches. On social issues, Pope Leo XIII promulgated Rerum novarum (1891), which was followed by Quadragesimo anno (1931) of Pius XI and Centesimus annus (1991) of John Paul II. Pius XII spoke on the same topic to a consistory of cardinals, in his Christmas messages and to numerous academic and professional associations.[2]

Modern encyclicals by pope

Pope Term of Papacy Number of encyclicals Texts
Encyclicals of Pope Benedict XIV 1740–1758
Encyclicals of Pope Pius VI 1775–1799 27
Encyclicals of Pope Leo XII 1823–1829 4
Encyclicals of Pope Gregory XVI 1831–1846 9
Encyclicals of Pope Pius IX 1846–1878 38
Encyclicals of Pope Leo XIII 1878–1903 85 [1]
Encyclicals of Pope Pius X 1903–1914 17 [2]
Encyclicals of Pope Benedict XV 1914–1922 12 [3]
Encyclicals of Pope Pius XI 1922–1938 31 [4]
Encyclicals of Pope Pius XII 1939–1958 41 [5]
Encyclicals of Pope John XXIII 1958–1963 8 [6]
Encyclicals of Pope Paul VI 1963–1978 7 [7]
Encyclicals of Pope John Paul II 1978–2005 14 [8]
Encyclicals of Pope Benedict XVI 2005–2013 3 [9]
Encyclicals of Pope Francis 2013–present 2 [10]

Anglican usage

Amongst Anglicans the term encyclical was revived in the late 19th century. It is applied to circular letters issued by the English primates.

Important Anglican encyclicals

Important Eastern Orthodox encyclicals



  1. ^ Acta Apostolicae Sedis, (AAS) 1951, 835, AAS 1958, 90, AAS 1941, 40, AAS 1952, 258
  2. ^ Allocution to the Cardinals AAS 1946, 141, and, AAS 1952, 5, AAS 1955, 15; and, for example in his Christmas Message 1954, AAS, medical doctors on the use of modern weapons, AAS 1954, 587, farmers, AAS 1950, 251, fashion AAS 1957, 1011, human dignity, AAS 1951, 215, AAS 1957, 830
  3. ^


  • Acta Apostolicae Sedis, (AAS), Roma Vaticano, 1920–2007
  • The Oxford Dictionary of the Christian Church (3rd. ed.), p. 545.

Internal links

  • List of papal documents at the Theology Library
  • Papal Encyclicals at GCatholic
  •, a source for etexts of most of the encyclicals from recent centuries
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