Machine translation of the 1948–1954 Italian original. The original text is authoritative.
INDEFECTIBILITY OF THE CHURCH. - The supernatural property of the true Church by which it will remain, until the end of the world, exactly as Jesus Christ instituted II. This concept includes: a) the perpetual duration or perdurance of the Church; b) the
(courtesy of Dr. T. M. Guarnaschelli)
INCUNBULUM - Authorities leading to mercy, finished printing in Mantua on 15 June 1486, photograph of the last verso page - Venice, Biblioteca Marciana.
Monaco (16,000 copies), which seems to have remained intact; followed by: the British Museum (11,000 copies); the Vatican Library (7,000 copies); the Pierpont Morgan Library and the Huntington Library in America. In Italy the largest collection of incunabula is held by the Biblioteca nazionale centrale di Firenze, but the libraries with the rarest pieces are the Ambrosiana and the Civica in Milan, the latter notably enriched by the acquisition of the Trivulzio collection.
A central catalogue of the fifteenth-century editions in all Italian libraries open to the public (excluding the Vatican Library) was begun in 1932 by Giuliano Bozzi, then director of the National Library in Rome; after the compilation it was found that the incunabula held by Italian libraries number about 100,000. - See pl. CXI.
BIBL.: The oldest and richest general repertory of fifteenth-century printing is: L. Hain, Repertorium bibliographicum, in quo libri omnes ab arte typographica inventa ad annum MD., recensentur, Stuttgart 1826-38. The following are arranged by country: AMERICA: M. Stilwell, Census of American incunabula, New York 1940; BELGIUM: L. Polain, Catalogue des livres imprimés au quinzième siècle des bibliothèques de Belgique, Brussels 1932; FRANCE: M. Pellechet, Catalogue général des incunables des bibliothèques de France, Paris 1897; GERMANY: Gesamtkatalog der Wiegendrucke, Leipzig 1925; GREAT BRITAIN: British Museum Catalogue: Catalogue of books printed in the fifteenth century, London 1908; INDIA: Italica: Indice generale degli incunaboli delle biblioteche d'Italia a cura del Centro nazionale d'informazioni bibliografica, compiled by T. M. Guarnaschelli and E. Valenziani, Rome 1943; SEE ALSO: NETHERLANDS: M. F. A. Campbell, Annales de la typographie néerlandaise au XVe siècle, The Hague 1874-90; SPAIN: H. Haeber, Bibliografia ibérica del siglo XV, The Hague-Leipzig 1903-1917; SWEDEN:
