It's called The 
INDEX LIBRORUM PROHIBITORUM 
 
The 
Index Librorum Prohibitorum ("List of Prohibited Books") was a list of publications 
prohibited by the 
Roman Catholic Church. It was abolished on June 14, 1966 by 
Pope Paul VI.
[1]
A first version (the 
Pauline Index) was promulgated by 
Pope Paul IV in 1559, and a revised and somewhat relaxed form (the 
Tridentine Index) was authorized at the 
Council of Trent. The promulgation of the 
Index marked the "
turning-point in the freedom of enquiry" in the Catholic world.
[2]
The avowed aim of the list was to protect the faith and morals of the faithful by preventing the reading of 
immoral books or works containing 
theological errors, although it also contained scientific works by leading astronomers such as 
Johannes Kepler. The various 
editions also contained the rules of the Church relating to the reading, selling and censorship of books. Manuscripts that passed inspection by official readers were printed with 
nihil obstat ("nothing forbids") or 
Imprimatur ("let it be printed") on the title page.
However, some of the scientific works on the Index (e.g. on the foundations of 
cosmology) are now routinely taught at Catholic universities worldwide, and 
Giordano Bruno whose works were on the Index now has a monument in Rome at the place where he was burned alive at the stake. The writings of 
Maria Valtorta that were on the Index have since received an imprimatur from a Roman Catholic bishop.
[3] Mary Faustina Kowalska, who was on the Index, has since been declared a saint.
[4][5] The developments since the abolition of the 
Index signify "the loss of relevance of the Index in the 21st century."
[6]
 
 
 
Title page of 
Index Librorum Prohibitorum (Venice 1564).
 
 
 
 
 
 
Index Librorum Prohibitorum - Wikipedia, the free encyclopedia