OpenStax-CNX module: m11974
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The Congregation of the Index
∗
Albert Van Helden
This work is produced by OpenStax-CNX and licensed under the
†
Creative Commons Attribution License 1.0
Abstract
A brief history of the Congregation of the Index.
Freedom of thought and written and oral expression is historically a relatively recent development. For
those who were the shepherds of Christian souls and whose function it was to get those souls to heaven,
the idea that anyone could think and say or write what he/she wanted was an absurdity. Moreover, it was
dangerous because it might lead others into error. As early as 170 CE, the Church promulgated a list of
genuine books of the New Testament and excluded others from use in religious practice. In 405 CE, Pope
Innocent I published a list of forbidden books, and at the end of that century issued a decree that has been
called the rst Index of Forbidden Books. It listed the genuine books of the Bible, the apocryphal books,
and heretical books. Henceforth Popes and Councils periodically published lists of forbidden books.
With the Council of Trent (1545-1563), the Church instituted a permanent institution to deal with
this subject. The Congregation of the Inquisition was initially charged with drawing up a complete list
of forbidden books. This list, the rst general one, was published in 1559; it was the rst to be called
Index. It was immediately subject to revision by a papal commission, which published its result in 1564, the
Tridentine Index. This index also provided rules for censorship. For almost two centuries, the Index was
updated periodically without major revisions, but beginning in 1664 the Index listed forbidden books not
according to categories but simply alphabetically. In 1757 and 1897 there were major revisions in the general
norms governing censorship and prohibition. The last edition of the Index was that of 1948; it was abolished
in 1966. The Catholic Church has, however, not relinquished authority to forbid the reading of books that
in its judgment are a danger to the faith and morals of Catholics. Further, books listed on the 1948 Index
are not automatically permitted reading for Catholics. For many permission from Church authorities is still
required.
In the cases of the Copernican System, the Church was slow to act because it did not see immediate
danger to the faithful in De Revolutionibus (1543). For one thing, it was written by a member of the Church.
Copernicus was a canon in a monastery, and he dedicated his book to Pope Paul III. For another, the book
contained a preface (discovered by Kepler not to have been written by Copernicus) that stated that the
geocentric system proposed in the book was only a mathematical hypothesis and made no claims about
how the universe was really constituted. But with Galileo's writings, which reached out to a wide audience
and brought the argument about Copernicus into the mainstream of educated discourse, the Church acted.
In 1616, after 73 years, it placed De Revolutionibus on the Index subject to revision, along with several
other books that defended the Copernican System. It is interesting to note that the revisions required in
Copernicus's book were, in terms of the total work, actually very minor. Copies of De Revolutionibus that
were in Italy at this time show the revisions: a few deleted passages and a few changes of individual words.
None of Galileo's books were placed on the Index at this time. Kepler'sNew Astronomy, his Epitome of
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OpenStax-CNX module: m11974
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Copernican Astronomy, and his World Harmony were quickly placed on the Index. During the proceedings
against Galileo in 1633, his Dialogue Concerning the Two Chief Systems of the World was placed on the
Index, where it remained until 1824.
Glossary
Denition 1: canon
- One of a body of dignitaries attached to a cathedral or a collegiate church, or a member of certain
religious orders.
References
[1] "index of forbidden books".
Catholic Encyclopedia.
[2] Paul F. Grendler. The Roman Inquiaition and the Venetian Press. Princeton University Press, Princeton,
1977.
[3] Paul F. Grendler.
London, 1981.
. Variorum Reprints,
Culture and Censorship in late Renaissance Italy and France
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