Index Librorum Prohibitorum

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Title page of Index Librorum Prohibitorum (Venice 1564) Index Librorum Prohibitorum 1.jpg
Title page of Index Librorum Prohibitorum (Venice 1564)

The Index librorum prohibitorum ("List of Prohibited Books") was a list of publications deemed heretical or contrary to morality by the Sacred Congregation of the Index (a former Dicastery of the Roman Curia), and Catholics were forbidden to read them without permission. [1]

The Congregation for the Doctrine of the Faith is the oldest among the nine congregations of the Roman Curia. It was founded to defend the church from heresy; today, it is the body responsible for promulgating and defending Catholic doctrine. Formerly known as the Supreme Sacred Congregation of the Roman and Universal Inquisition, it is informally known in many Catholic countries as the Holy Office, and between 1908 and 1965 was officially known as the Supreme Sacred Congregation of the Holy Office.

A dicastery is a department of the Roman Curia, the administration of the Holy See through which the pope directs the Roman Catholic Church. The most recent comprehensive constitution of the church, Pastor bonus (1988), includes this definition:

By the word "dicasteries" are understood the Secretariat of State, Congregations, Tribunals, Councils and Offices, namely, the Apostolic Camera, the Administration of the Patrimony of the Apostolic See and the Prefecture for the Economic Affairs of the Holy See.

The Roman Curia comprises the administrative institutions of the Holy See and the central body through which the affairs of the Catholic Church are conducted. It acts in the Pope’s name and with his authority for the good and for the service of the particular Churches and provides the central organization for the Church to advance its objectives.


There were attempts to censor individual books before the sixteenth century, notably the ninth-century Decretum Glasianum, but none of these were either official or widespread. [2] In 1559, Pope Paul IV promulgated the Pauline Index, which Paul F. Grendler believed marked "the turning-point for the freedom of enquiry in the Catholic world". After less than a year, it was replaced by the Tridentine Index which relaxed aspects of the Pauline Index that had been criticized and had prevented its acceptance. [1] The 20th and final edition appeared in 1948, and the Index was formally abolished on 14 June 1966 by Pope Paul VI. [3] [4]

Pope Paul IV 16th-century Catholic pope

Pope Paul IV, C.R., born Gian Pietro Carafa, was head of the Catholic Church and ruler of the Papal States from 23 May 1555 to his death in 1559. While serving as papal nuncio in Spain, he developed an anti-Spanish outlook that later coloured his papacy. A part of Papal States was invaded by Spain during his papacy and in response to this, he called for a French military intervention. To avoid a conflict at the same time of the Italian War of 1551–1559, the Papacy and Spain reached a compromise with the Treaty of Cave: French and Spanish forces left the Papal States and the Pope adopted a neutral stance between France and Spain.

Pope Paul VI Pope of the Roman Catholic Church from 1963 to 1978

Pope Saint Paul VI was head of the Catholic Church and sovereign of the Vatican City State from 21 June 1963 to his death in 1978. Succeeding John XXIII, he continued the Second Vatican Council which he closed in 1965, implementing its numerous reforms, and fostered improved ecumenical relations with Eastern Orthodox and Protestant churches, which resulted in many historic meetings and agreements. Montini served in the Holy See's Secretariat of State from 1922 to 1954. While in the Secretariat of State, Montini and Domenico Tardini were considered as the closest and most influential advisors of Pius XII, who in 1954 named him Archbishop of Milan, the largest Italian diocese. Montini later became the Secretary of the Italian Bishops' Conference. John XXIII elevated him to the College of Cardinals in 1958, and after the death of John XXIII, Montini was considered one of his most likely successors.

The stated aim of the list was to protect the faith and morals of the faithful by preventing the reading of theologically, culturally, or politically disruptive books. Such books included works by astronomers, such as Johannes Kepler's Epitome astronomiae Copernicanae which was on the Index from 1621 to 1835, by philosophers, such as Immanuel Kant's Critique of Pure Reason and editions and translations of the Bible that had not been approved. Editions of the Index also contained the rules of the Church relating to the reading, selling, and pre-emptive censorship of books. [5]

Johannes Kepler 17th-century German mathematician, astronomer and astrologer

Johannes Kepler was a German astronomer, mathematician, and astrologer. He is a key figure in the 17th-century scientific revolution, best known for his laws of planetary motion, and his books Astronomia nova, Harmonices Mundi, and Epitome Astronomiae Copernicanae. These works also provided one of the foundations for Newton's theory of universal gravitation.

Immanuel Kant Prussian philosopher

Immanuel Kant was an influential German philosopher in the Age of Enlightenment. In his doctrine of transcendental idealism, he argued that space, time, and causation are mere sensibilities; "things-in-themselves" exist, but their nature is unknowable. In his view, the mind shapes and structures experience, with all human experience sharing certain structural features. He drew a parallel to the Copernican revolution in his proposition that worldly objects can be intuited a priori ('beforehand'), and that intuition is therefore independent from objective reality. Kant believed that reason is the source of morality, and that aesthetics arise from a faculty of disinterested judgment. Kant's views continue to have a major influence on contemporary philosophy, especially the fields of epistemology, ethics, political theory, and post-modern aesthetics.

<i>Critique of Pure Reason</i> 1781 book by Immanuel Kant

The Critique of Pure Reason is a 1781 book by the German philosopher Immanuel Kant, in which the author seeks to determine the limits and scope of metaphysics. A heavily-revised second edition was published in 1787. Also referred to as Kant's "First Critique", it was followed by the Critique of Practical Reason (1788) and the Critique of Judgment (1790). In the preface to the first edition, Kant explains that by a "critique of pure reason" he means not "a critique of books and systems, but of the faculty of reason in general, in respect of all knowledge after which it may strive independently of all experience" and that he aims to reach a decision about "the possibility or impossibility of metaphysics". The First Critique is often viewed as a culmination of several centuries of early-modern philosophy, and an inauguration of modern philosophy.

Latin Church canon law still recommends that works should be submitted to the judgment of the local ordinary if they concern sacred Scripture, theology, canon law, or church history, religion or morals. [6] The local ordinary consults someone whom he considers competent to give a judgment and, if that person gives the nihil obstat ("nothing forbids"), the local ordinary grants the imprimatur ("let it be printed"). [7] Members of religious institutes require the imprimi potest (it can be printed) of their major superior to publish books on matters of religion or morals. [8]

Latin Church automonous particular church making up of most of the Western world Catholics

The Latin Church is the largest particular church of the Catholic Church, employing the Latin liturgical rites. It is one of 24 sui iuris churches, the 23 other forming the Eastern Catholic Churches. It is headed by the bishop of Rome, the pope – traditionally also called the Patriarch of the West – with cathedra in this role at the Archbasilica of St. John Lateran in Rome, Italy. The Latin Church traces its history to the earliest days of Christianity, according to Catholic tradition, through its direct leadership under the Holy See.

Nihil obstat is a declaration of no objection to an initiative or an appointment.

An imprimatur is, in the proper sense, a declaration authorizing publication of a book. The term is also applied loosely to any mark of approval or endorsement.

Some of the scientific theories contained in works in early editions of the Index have long been taught at Catholic universities. For example, the general prohibition of books advocating heliocentrism was removed from the Index in 1758, but two Franciscan mathematicians had published an edition of Isaac Newton's Principia Mathematica (1687) in 1742, with commentaries and a preface stating that the work assumed heliocentrism and could not be explained without it. [9] A work of Antonio Rosmini-Serbati was on the Index, but he was beatified in 2007. [10] Some have argued that the developments since the abolition of the Index signify "the loss of relevance of the Index in the 21st century." [11]

Heliocentrism Astronomical model where the Earth and planets revolve around the Sun

Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System. Historically, heliocentrism was opposed to geocentrism, which placed the Earth at the center. The notion that the Earth revolves around the Sun had been proposed as early as the 3rd century BC by Aristarchus of Samos, but at least in the medieval world, Aristarchus's heliocentrism attracted little attention—possibly because of the loss of scientific works of the Hellenistic Era.

Isaac Newton Influential British physicist and mathematician

Sir Isaac Newton was an English mathematician, physicist, astronomer, theologian, and author who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution. His book Philosophiæ Naturalis Principia Mathematica, first published in 1687, laid the foundations of classical mechanics. Newton also made seminal contributions to optics, and shares credit with Gottfried Wilhelm Leibniz for developing the infinitesimal calculus.

<i>Philosophiæ Naturalis Principia Mathematica</i> tract by Isaac Newton

Philosophiæ Naturalis Principia Mathematica, often referred to as simply the Principia, is a work in three books by Isaac Newton, in Latin, first published 5 July 1687. After annotating and correcting his personal copy of the first edition, Newton published two further editions, in 1713 and 1726. The Principia states Newton's laws of motion, forming the foundation of classical mechanics; Newton's law of universal gravitation; and a derivation of Kepler's laws of planetary motion.

J. Martínez de Bujanda's Index Librorum Prohibitorum, 1600–1966 lists the authors and writings in the successive editions of the Index. [12]

Background and history

European restrictions on the right to print

Printing press from 1811, Munich, Germany. Handtiegelpresse von 1811.jpg
Printing press from 1811, Munich, Germany.

The historical context in which the Index appeared involved the early restrictions on printing in Europe. The refinement of moveable type and the printing press by Johannes Gutenberg around 1440 changed the nature of book publishing, and the mechanism by which information could be disseminated to the public. [13] Books, once rare and kept carefully in a small number of libraries, could be mass-produced and widely disseminated.

In the 16th century, both the churches and governments in most European countries attempted to regulate and control printing because it allowed for rapid and widespread circulation of ideas and information. The Protestant Reformation generated large quantities of polemical new writing by and within both the Catholic and Protestant camps, and religious subject-matter was typically the area most subject to control. While governments and church encouraged printing in many ways, which allowed the dissemination of Bibles and government information, works of dissent and criticism could also circulate rapidly. As a consequence, governments established controls over printers across Europe, requiring them to have official licenses to trade and produce books. [14] [15]

The early versions of the Index began to appear from 1529 to 1571. In the same time frame, in 1557 the English Crown aimed to stem the flow of dissent by chartering the Stationers' Company. The right to print was restricted to two universities and to the 21 existing printers in the city of London, which had between them 53 printing presses.[ citation needed ]

The French crown also tightly controlled printing, and the printer and writer Etienne Dolet was burned at the stake for atheism in 1546. The 1551 Edict of Châteaubriant comprehensively summarized censorship positions to date, and included provisions for unpacking and inspecting all books brought into France. [16] [17] The 1557 Edict of Compiègne applied the death penalty to heretics and resulted in the burning of a noblewoman at the stake. [18] Printers were viewed as radical and rebellious, with 800 authors, printers and book dealers being incarcerated in the Bastille. [19] At times, the prohibitions of church and state followed each other, e.g. René Descartes was placed on the Index in the 1660s and the French government prohibited the teaching of Cartesianism in schools in the 1670s. [20]

The Copyright Act 1710 in Britain, and later copyright laws in France, eased this situation. However, historian Eckhard Höffner claims that copyright laws and their restrictions acted as a barrier to progress in those countries for over a century, since British publishers could print valuable knowledge in limited quantities for the sake of profit; while the German economy prospered in the same time frame since there were no restrictions. [21] [22]

Early indexes (1529–1571)

Title page of the first Papal Index, Index Auctorum et Librorum, published in 1557 and then withdrawn. Index 1557.jpg
Title page of the first Papal Index, Index Auctorum et Librorum, published in 1557 and then withdrawn.

The first list of the kind was not published in Rome, but in Catholic Netherlands (1529); Venice (1543) and Paris (1551) under the terms of the Edict of Châteaubriant followed this example. By mid-century, in the tense atmosphere of wars of religion in Germany and France, both Protestant and Catholic authorities reasoned that only control of the press, including a catalog of prohibited works, coordinated by ecclesiastic and governmental authorities could prevent the spread of heresy. [23]

The first Roman Index was printed in 1557 under the direction of Pope Paul IV (1555–1559), but then withdrawn for unclear reasons. [24] In 1559, a new index was finally published, banning the entire works of some 550 authors in addition to the individual proscribed titles: [24] [note 1] "The Pauline Index felt that the religious convictions of an author contaminated all his writing." [23] The work of the censors was considered too severe and met with much opposition even in Catholic intellectual circles; after the Council of Trent had authorised a revised list prepared under Pope Pius IV, the so-called Tridentine Index was promulgated in 1564; it remained the basis of all later lists until Pope Leo XIII, in 1897, published his Index Leonianus.

The blacklisting of some Protestant scholars even when writing on subjects a modern reader would consider outside the realm of dogma meant that, unless they obtained a dispensation, obedient Catholic thinkers were denied access to works including: botanist Conrad Gesner's Historiae animalium ; the botanical works of Otto Brunfels; those of the medical scholar Janus Cornarius; to Christoph Hegendorff or Johann Oldendorp on the theory of law; Protestant geographers and cosmographers like Jacob Ziegler or Sebastian Münster; as well as anything by Protestant theologians like Martin Luther, John Calvin or Philipp Melanchthon. [note 2] Among the inclusions was the Libri Carolini, a theological work from the 9th century court of Charlemagne, which was published in 1549 by Bishop Jean du Tillet and which had already been on two other lists of prohibited books before being inserted into the Tridentine Index. [26]

Sacred Congregation of the Index (1571–1917)

In 1571, a special congregation was created, the Sacred Congregation of the Index, which had the specific task to investigate those writings that were denounced in Rome as being not exempt of errors, to update the list of Pope Pius IV regularly and also to make lists of required corrections in case a writing was not to be condemned absolutely but only in need of correction; it was then listed with a mitigating clause (e.g., donec corrigatur (forbidden until corrected) or donec expurgetur (forbidden until purged)).[ citation needed ]

Several times a year, the congregation held meetings. During the meetings, they reviewed various works and documented those discussions. In between the meetings was when the works to be discussed were thoroughly examined, and each work was scrutinized by two people. At the meetings, they collectively decided whether or not the works should be included in the Index. Ultimately, the pope was the one who had to approve of works being added or removed from the Index. It was the documentation from the meetings of the congregation that aided the pope in making his decision. [27]

Galileo being condemned in 1633. Galileo before the Holy Office.jpg
Galileo being condemned in 1633.

This sometimes resulted in very long lists of corrections, published in the Index Expurgatorius, which was cited by Thomas James in 1627 as "an invaluable reference work to be used by the curators of the Bodleian library when listing those works particularly worthy of collecting". [28] Prohibitions made by other congregations (mostly the Holy Office) were simply passed on to the Congregation of the Index, where the final decrees were drafted and made public, after approval of the Pope (who always had the possibility to condemn an author personally—there are only a few examples of such condemnation, including those of Lamennais and Hermes).[ citation needed ]

An update to the Index was made by Pope Leo XIII, in the 1897 apostolic constitution Officiorum ac Munerum, known as the "Index Leonianus". [29] Subsequent editions of the Index were more sophisticated; they graded authors according to their supposed degree of toxicity, and they marked specific passages for expurgation rather than condemning entire books. [30]

The Sacred Congregation of the Inquisition of the Roman Catholic Church later became the Holy Office, and since 1965 has been called the Congregation for the Doctrine of the Faith. The Congregation of the Index was merged with the Holy Office in 1917, by the Motu Proprio "Alloquentes Proxime" of Pope Benedict XV; the rules on the reading of books were again reelaborated in the new Codex Iuris Canonici. From 1917 onward, the Holy Office (again) took care of the Index.[ citation needed ]

Nazi ideologist Alfred Rosenberg. His Myth of the Twentieth Century was placed on the Index for scorning Catholic dogma and the fundamentals of the Christian religion. Bundesarchiv Bild 146-1969-067-10, Alfred Rosenberg.jpg
Nazi ideologist Alfred Rosenberg. His Myth of the Twentieth Century was placed on the Index for scorning Catholic dogma and the fundamentals of the Christian religion.

Holy Office (1917–1966)

While individual books continued to be forbidden, the last edition of the Index to be published appeared in 1948. This 20th [32] edition contained 4,000 titles censored for various reasons: heresy, moral deficiency, sexual explicitness, and so on. That some atheists, such as Schopenhauer and Nietzsche, were not included was due to the general (Tridentine) rule that heretical works (i.e., works that contradict Catholic dogma) are ipso facto forbidden. Some important works are absent simply because nobody bothered to denounce them. [33] Many actions of the congregations were of a definite political content. [34] Among the significant listed works of the period was the Nazi philosopher Alfred Rosenberg's Myth of the Twentieth Century for scorning and rejecting "all dogmas of the Catholic Church, indeed the very fundamentals of the Christian religion". [31]

Abolition (1966)

On 7 December 1965, Pope Paul VI issued the Motu Proprio Integrae servandae that reorganized the Holy Office as the Sacred Congregation for the Doctrine of the Faith. [35] The Index was not listed as being a part of the newly constituted congregation's competence, leading to questioning whether it still was. This question was put to Cardinal Alfredo Ottaviani, pro-prefect of the congregation, who responded in the negative. [36] The Cardinal also indicated in his response that there was going to be a change in the Index soon.

A June 1966 Congregation for the Doctrine of the Faith notification announced that, while the Index maintained its moral force, in that it taught Christians to beware, as required by the natural law itself, of those writings that could endanger faith and morality, it no longer had the force of ecclesiastical positive law with the associated penalties. [37]

Scope and impact

This 1711 illustration for the Index Librorum Prohibitorum depicts the Holy Ghost supplying the book-burning fire. Titelkupfer Index librorum prohibitorum.jpg
This 1711 illustration for the Index Librorum Prohibitorum depicts the Holy Ghost supplying the book-burning fire.

Censorship and enforcement

The Index was not simply a reactive work. Roman Catholic authors had the opportunity to defend their writings and could prepare a new edition with necessary corrections or deletions, either to avoid or to limit a ban. Pre-publication censorship was encouraged.[ citation needed ]

The Index was enforceable within the Papal States, but elsewhere only if adopted by the civil powers, as happened in several Italian states. [38] Other areas adopted their own lists of forbidden books. In the Holy Roman Empire book censorship, which preceded publication of the Index, came under control of the Jesuits at the end of the 16th century, but had little effect, since the German princes within the empire set up their own systems. [39] In France it was French officials who decided what books were banned [39] and the Church's Index was not recognized. [40] Spain had its own Index Librorum Prohibitorum, which corresponded largely to the Church's, [41] but also included a list of books that were allowed once the forbidden part (sometimes a single sentence) was removed or "expurgated". [42]

Continued moral obligation

On 14 June 1966, the Congregation for the Doctrine of the Faith responded to inquiries it had received regarding the continued moral obligation concerning books that had been listed in the Index. The response spoke of the books as examples of books dangerous to faith and morals, all of which, not just those once included in the Index, should be avoided regardless of the absence of any written law against them. The Index, it said, retains its moral force "inasmuch as" (quatenus) it teaches the conscience of Christians to beware, as required by the natural law itself, of writings that can endanger faith and morals, but it (the Index of Forbidden Books) no longer has the force of ecclesiastical law with the associated censures. [43]

The congregation thus placed on the conscience of the individual Christian the responsibility to avoid all writings dangerous to faith and morals, while at the same time abolishing the previously existing ecclesiastical law and the relative censures, [44] without thereby declaring that the books that had once been listed in the various editions of the Index of Prohibited Books had become free of error and danger.

In a letter of 31 January 1985 to Cardinal Giuseppe Siri, regarding the book The Poem of the Man-God , Cardinal Joseph Ratzinger (then Prefect of the Congregation, who later became Pope Benedict XVI), referred to the 1966 notification of the Congregation as follows: "After the dissolution of the Index, when some people thought the printing and distribution of the work was permitted, people were reminded again in L'Osservatore Romano (15 June 1966) that, as was published in the Acta Apostolicae Sedis (1966), the Index retains its moral force despite its dissolution. A decision against distributing and recommending a work, which has not been condemned lightly, may be reversed, but only after profound changes that neutralize the harm which such a publication could bring forth among the ordinary faithful." [45]

Changing judgments

The monument to philosopher Giordano Bruno (who was on the Index) at the Campo de' Fiori in Rome where he was burned at the stake. The statue is placed so that Bruno faces in the direction of the Vatican. Brunostatue.jpg
The monument to philosopher Giordano Bruno (who was on the Index) at the Campo de' Fiori in Rome where he was burned at the stake. The statue is placed so that Bruno faces in the direction of the Vatican.

The content of the Index Librorum Prohibitorum saw deletions as well as additions over the centuries. Writings by Antonio Rosmini-Serbati were placed on the Index in 1849 but were removed by 1855, and Pope John Paul II mentioned Rosmini's work as a significant example of "a process of philosophical enquiry which was enriched by engaging the data of faith". [46] The 1758 edition of the Index removed the general prohibition of works advocating heliocentrism as a fact rather than a hypothesis. [47] Giordano Bruno was burned at the stake in Campo de' Fiori in Rome in 1600, yet some of his ideas now form the foundations of modern cosmology. [48]

Listed works and authors

Rene Descartes went on the Index in 1663. Frans Hals - Portret van Rene Descartes.jpg
René Descartes went on the Index in 1663.

Noteworthy figures on the Index include Simone de Beauvoir, Nicolas Malebranche, Jean-Paul Sartre, Michel de Montaigne, Voltaire, Denis Diderot, Victor Hugo, Jean-Jacques Rousseau, André Gide, Nikos Kazantzakis, Emanuel Swedenborg, Baruch Spinoza, Immanuel Kant, David Hume, René Descartes, Francis Bacon, Thomas Browne, John Milton, John Locke, Nicolaus Copernicus, Galileo Galilei, Blaise Pascal, and Hugo Grotius. The first woman to be placed on the list was Magdalena Haymairus in 1569, who was listed for her children's book Die sontegliche Episteln über das gantze Jar in gesangsweis gestellt (Sunday Epistles on the whole Year, put to the test). [49] [50] [51] [52] Other women include Anne Askew, [53] Olympia Fulvia Morata, Ursula of Munsterberg (1491–1534), Veronica Franco, and Paola Antonia Negri (1508–1555). [54] Charles Darwin's works were never included. [55]

In many cases, an author's opera omnia (complete works) were forbidden. However, the Index stated that the prohibition of someone's opera omnia did not preclude works that were not concerned with religion and were not forbidden by the general rules of the Index. This explanation was omitted in the 1929 edition, which was officially interpreted in 1940 as meaning that opera omnia covered all the author's works without exception. [56]

Cardinal Ottaviani stated in April 1966 that there was too much contemporary literature and the Sacred Congregation for the Doctrine of the Faith could not keep up with it. [57]

See also


  1. They included everything by Pietro Aretino, Machiavelli, Erasmus and Rabelais. [25]
  2. These authors are instanced by Schmitt 1991.

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  1. 1 2 Grendler, Paul F. "Printing and censorship" in The Cambridge History of Renaissance Philosophy, Charles B. Schmitt, ed. (Cambridge University Press, 1988, ISBN   978-0-52139748-3) pp. 45–46
  2. Lenard, Max (2006). "On the origin, development and demise of the Index librorum prohibitorum". Journal of Access Services. 3 (4): 51–63. doi:10.1300/J204v03n04_05.
  3. The Church in the Modern Age, (Volume 10) by Hubert Jedin, John Dolan, Gabriel Adriányi 1981 ISBN   082450013X, page 168
  4. Kusukawa, Sachiko (1999). "Galileo and Books". Starry Messenger.
  5. Index Librorum Prohibitorum, 1559, Regula Quarta ("Rule 4")
  6. Code of Canon Law, canon 827 §3
  7. Code of Canon Law, canon 830
  8. Code of Canon Law, canon 832
  9. John L.Heilbron, Censorship of Astronomy in Italy after Galileo (in McMullin, Ernan ed., The Church and Galileo, University of Notre Dame Press, Notre Dame, 2005, p. 307, IN. ISBN   0-268-03483-4)
  10. Cardinal Saraiva calls new blessed Antonio Rosmini "giant of the culture"
  11. Robert Wilson, 1997 Astronomy Through the Ages ISBN   0-7484-0748-0
  12. Jesús Martínez de Bujanda, Index Librorum Prohibitorum, 1600–1966 (v. 11 in series Index des livres interdits) (Droz, Geneva, 2002 ISBN   978-2-60000818-1)
  13. McLuhan, Marshall (1962), The Gutenberg Galaxy: The Making of Typographic Man (1st ed.), University of Toronto Press, ISBN   978-0-8020-6041-9 page 124
  14. MacQueen, Hector L.; Waelde, Charlotte; Laurie, Graeme T. (2007). Contemporary Intellectual Property: Law and Policy. Oxford University Press. p. 34. ISBN   978-0-19-926339-4.
  15. de Sola Pool, Ithiel (1983). Technologies of freedom. Harvard University Press. p. 14. ISBN   978-0-674-87233-2.
  16. The Rabelais encyclopedia by Elizabeth A. Chesney 2004 ISBN   0-313-31034-3 pages 31–32
  17. The printing press as an agent of change by Elizabeth L. Eisenstein 1980 ISBN   0-521-29955-1 page 328
  18. Robert Jean Knecht, The Rise and Fall of Renaissance France: 1483–1610 2001, ISBN   0-631-22729-6 page 241
  19. de Sola Pool, Ithiel (1983). Technologies of freedom. Harvard University Press. p. 15. ISBN   978-0-674-87233-2.
  20. A companion to Descartes by Janet Broughton, John Peter Carriero 2007 ISBN   1-4051-2154-8 page
  21. Der Spiegel August 18 2010 article: No Copyright Law
  22. Geschichte und Wesen des Urheberrechts (History and nature of copyright) by Eckhard Höffner, July 2010 (in German) ISBN   3-930893-16-9
  23. 1 2 Schmitt 1991:45.
  24. 1 2 Studies in the History of Venice by Brown Horatio Robert Forbes p.70
  25. Schmitt 1991:45.
  26. Paul Oskar Kristeller (editor), Itinerarium Italicum (Brill 1975 ISBN   978-90-0404259-9), p. 90.
  27. Heneghan, Thomas (2005). "Secrets Behind The Forbidden Books". America. 192 (4). Archived from the original on 26 July 2014. Retrieved 27 October 2014.
  28. Green, Jonathan; Karolides, Nicholas J. (2005), Encyclopedia on Censorship, Facts on File, Inc, p. 257
  29. Catholic encyclopedia
  30. Lyons, Martyn. (2011). Books: A Living History. Los Angeles, CA: Getty Publications. ISBN   978-1-60606-083-4, p. 83
  31. 1 2 Richard Bonney; Confronting the Nazi War on Christianity: the Kulturkampf Newsletters, 1936–1939; International Academic Publishers; Bern; 2009 ISBN   978-3-03911-904-2; p. 122
  32. Encyclopædia Britannica: Index Librorum Prohibitorum
  33. "The works appearing on the Index are only those that ecclesiastical authority was asked to act upon" (Encyclopædia Britannica: Index Librorum Prohibitorum).
  34. "The entanglement of Church and state power in many cases led to overtly political titles being placed on the Index, titles which had little to do with immorality or attacks on the Catholic faith. For example, a history of Bohemia, the Rervm Bohemica Antiqvi Scriptores Aliqvot ... by Marqvardi Freheri (published in 1602), was placed on the Index not for attacking the Church, but rather because it advocated the independence of Bohemia from the (Catholic) Austro-Hungarian Empire. Likewise, The Prince by Machiavelli was placed in the Index in 1559 after it was blamed for widespread political corruption in France (Curry, 1999, p.5)" (David Dusto, Index Librorum Prohibitorum: The History, Philosophy, and Impact of the Index of Prohibited Books). Archived 20 October 2012 at the Wayback Machine
  35. Paul VI, Pope (7 December 1965). "Integrae servandae". Retrieved 10 July 2016.
  36. L'Osservatore della Domenica, 24 April 1966, pg. 10.
  37. Congregation for the Doctrine of the Faith (14 June 1966). "Notification regarding the abolition of the Index of books". Archived from the original on 7 March 2014. Retrieved 10 July 2016.
  38. Stephen G. Burnett, Christian Hebraism in the Reformation Era (Brill 2012 ISBN   978-9-00422248-9), p. 236
  39. 1 2 Lucien Febvre, Henri Jean Martin, The Coming of the Book: The Impact of Printing 1450–1800 (Verso 1976 ISBN   978-1-85984108-2), pp. 245–246
  40. John Michael Lewis, Galileo in France (Peter Lang 2006 ISBN   978-0-82045768-0), p. 11
  41. C. B. Schmitt, Quentin Skinner, Eckhard Kessler, Renaissance Philosophy'' (Cambridge University Press 1988 ISBN   978-0-52139748-3), p. 48
  42. Bernardo de Sandoval, Archbishop of Toledo Index Librorum et Expurgatorium (Louis Sanchez Typography, Madrid 1612) Regla XII
  43. "Haec S. Congregatio pro Doctrina Fidei, facto verbo cum Beatissimo Patre, nuntiat Indicem suum vigorem moralem servare, quatenus Christifidelium conscientiam docet, ut ab illis scriptis, ipso iure naturali exigente, caveant, quae fidem ac bonos mores in discrimen adducere possint; eundem tamen non-amplius vim legis ecclesiasticae habere cum adiectis censuris" (Acta Apostolicae Sedis 58 (1966), p. 445). Cf. Italian text published, together with the Latin, on L'Osservatore Romano of 15 June 1966)
  44. Post litteras apostolicas
  45. Poem of the Man-God
  46. Encyclical Fides et ratio, 74
  47. McMullin, Ernan, ed. The Church and Galileo. Notre Dame, IN: University of Notre Dame Press. 2005. ISBN   0-268-03483-4. pp. 307, 347
  48. New Yorker Magazine, August 25, 2008: The Forbidden World
  49. Stead, William Thomas (1902). "The Index Expurgatorius". The Review of Reviews. 26: 498. Retrieved 8 February 2017.
  50. Gifford, William (1902). "The Roman Index". The Quarterly Review. 196: 602–603. Retrieved 8 February 2017.
  51. Catholic Church (1569). Index Librorum Prohibitorum cum Regulis confectis per Patres a Tridentina Synodo delectos authoritate ... Pii IIII. comprobatus. Una cum iis qui mandato Regiae Catholicae Majestatis et ... Ducis Albani, Consiliique Regii decreto prohibentur, etc. Leodii. Retrieved 8 February 2017.
  52. Bujanda, Jesús Martínez de; Davignon, René (1988). Index d'Anvers, 1569, 1570, 1571. Librairie Droz. p. 196. Retrieved 8 February 2017.
  53. Putnam, George Haven (1906–1907). The censorship of the church of Rome and its influence upon the production and distribution of literature : a study of the history of the prohibitory and expurgatory indexes, together with some consideration of the effects of Protestant censorship and of censorship by the state. New York: G.P. Putnam's sons. p. 250. Retrieved 8 February 2017.
  54. Hilgers, Joseph (1904). Der Index der verbotenen Bücher. In seiner neuen Fassung dargelegt und rechtlich-historisch gewürdigt. Freiburg in Breisgau: Herder. pp. 145–150.
  55. Rafael Martinez, professor of the philosophy of science at the Santa Croce Pontifical University in Rome, in speech reported on Catholic Ireland net Archived 7 June 2009 at the Wayback Machine Accessed 26 May 2009
  56. Jesús Martínez de Bujanda, Index librorum prohibitorum: 1600–1966 (Droz 2002 ISBN   2-600-00818-7), p. 36
  57. L'Osservatore della Domenica, 24 April 1966, p. 10.