The truth is that the Venetians, though they were willing to risk an open rupture with Rome, remained at heart sound Churchmen devoted to the principles of the Catholic Reaction. The Republic conceded the fact of Inquisitorial authority, while it reserved the letter of State-supervision. Venetian decadence was marked by this hypocrisy of pride; and so long as appearances were saved, the Holy Office exercised its functions freely. The nobles who acted as assessors had no sympathy with religious toleration, being themselves under the influence of confessors and directors.

How little the subjects of S. Mark at this epoch trusted the good faith of laws securing liberty of thought in Venice, may be gathered from what happened immediately after the publication of the Index Expurgatorius in 1596. From an official report upon the decline of the printing trade in Venice, it appears that within the space of a few months the number of presses fell from 125 to 40.[108] Printers were afraid to undertake either old or new works, and the trade languished for lack of books to publish. Yet an edict had been issued announcing that by the terms of the Concordat with Clement VIII., the Venetian press would only be subject to State control and not to the Roman tribunals.[109] The truth is that, in regard both to the Holy Office and to the Index, Venice was never strong enough to maintain the independence which she boasted. By cunning use of the confessional, and by unscrupulous control of opinion, the Church succeeded in doing there much the same as in any other Italian city. Successive Popes made, indeed, a show of respecting the liberties of the Republic. On material points, touching revenue and State-administration, they felt it wise to concede even more than complimentary privileges; and when Paul V. encroached upon these privileges, the Venetians were ready to resist him. Yet the quarrels between the Vatican and San Marco were, after all, but family disputes. The Venetians at the close of the sixteenth century proved themselves no better friends to spiritual freedom than were the Grand Dukes of Tuscany. Their political jealousies, commercial anxieties, and feints of maintaining a power that was rapidly decaying, denoted no partiality for the opponents of Rome—unless, like Sarpi, these wore the livery of the State, and defended with the pen its secular prerogatives. Therefore, when the Signory published Clement VIII.'s Index, when copies of that Index were sown broadcast, while only an edition of sixty was granted to the Concordat, authors and publishers felt, and felt rightly, that their day had passed. The art of printing sank at once to less than a third of its productivity. The city where it had flourished so long, and where it had effected so much of enduring value for European culture, was gagged in scarcely a less degree than Rome. We have full right to insist upon these facts, and to draw from them a stringent corollary. If Venice allowed the trade in books, which had brought her so much profit and such honor in the past, to be paralyzed by Clement's Index, what must have happened in other Italian towns? The blow which maimed Venetian literature, was mortal elsewhere; and the finest works of genius in the first half of the seventeenth century had to find their publishers in Paris.[110] But these reflections have led me to anticipate the proper development of the subject of this chapter.

In Italy at large, the forces of the Inquisition were directed, not as in Spain against heretics in masses, but against the leaders of heretical opinion; and less against personalities than against ideas. Italy during the Renaissance had been the workshop of ideas for Europe. It was the business of the Counter-Reformation to check the industry of that officina scientiarum, to numb the nervous centers which had previously emitted thought of pregnant import for the modern world, and to prevent the reflux of ideas, elaborated by the northern races in fresh forms, upon the intelligence which had evolved them. To do so now was comparatively easy. It only needed to put the engine of the Index Librorum Prohibitorum into working order in concert with the Inquisition.

Throughout the Middle Ages it had been customary to burn heretical writings. The bishops, the universities, and the Dominican Inquisitors exercised this privilege; and by their means, in the age of manuscripts, the life of a book was soon extinguished. Whole libraries were sometimes sacrificed at one fell swoop, as in the case of the 6000 volumes destroyed at Salamanca in 1490 by Torquemada, on a charge of sorcery.[111] After the invention of printing it became more difficult to carry on this warfare against literature, while the rapid diffusion of Protestant opinions through the press rendered the need for their extermination urgent. Sixtus IV. laid a basis for the Index by prohibiting the publication of any books which had not previously been licensed by ecclesiastical authority. Alexander VI. by a brief of 15O1 confirmed this measure, and placed books under the censorship of the episcopacy and the Inquisition. Finally, the Lateran Council, in its tenth session, held under the auspices of Leo X., gave solemn ecumenical sanction to these regulations.

The censorship having been thus established, the next step was to form a list of books prohibited by the Inquisitors appointed for that purpose. The Sorbonne in Paris drew one up for their own use, and even presented a petition to Francis I. that publication through the press should be forbidden altogether.[112] A royal edict to this effect was actually promulgated in 1535. Charles V. commissioned the University of Louvain in 1539 to furnish a similar catalogue, proclaiming at the same time the penalty of death for all who read or owned the works of Luther in his realms.[113] The University printed their catalogue with Papal approval in 1549.

These lists of the Sorbonne and Louvain formed the nucleus of the Apostolic Index, which, after the close of the Council of Trent, became binding upon Catholics. When the Inquisition had been established in Rome, Caraffa, who was then at its head, obtained the sanction of Paul III. for submitting all books, old or new, printed or in manuscript, to the supervision of the Holy Office. He also contrived to place booksellers, public and private libraries, colporteurs and officers of customs, under the same authority; so that from 1543 forward it was a penal offence to print, sell, own, convey or import any literature, of which the Inquisition had not first been informed, and for the diffusion or possession of which it had not given its permission. Giovanni della Casa, who was sent in 1546 to Venice with commission to prosecute P. Paolo Vergerio for heresy, drew up a list of about seventy prohibited volumes, which was printed in that city.[114] Other lists appeared, at Florence in 1552, and at Milan in 1554. Philip II. at last, in 1558, issued a royal edict commanding the publication of one catalogue which should form the standard for such Indices throughout his States.[115] These lists, revised, collated, and confirmed by Papal authority, were reprinted, in the form which ever afterwards obtained, at Rome, by command of Paul IV. in 1559.

The Tridentine Council ratified the regulations of the Inquisition and the Index concerning prohibited books, and referred the execution of them in detail to the Papacy. A congregation was appointed at Rome, which, though technically independent of the Holy Office, worked in concert with it. This Congregation of the Index brought the Tridentine decrees into harmony with the practice that had been developed by Caraffa as Inquisitor and Pope. Their list was published in 1564 with the authority of Pius IV. Finally, in 1595 the decrees embodying the statutes of the Church upon this topic were issued in print, together with a largely augmented catalogue of interdicted books. This document will form the basis of what I have to say with regard to the Catholic crusade against literature.

Not without reason did Aonio Paleario call this engine of the Index 'a dagger drawn from the scabbard to assassinate letters'—sica districta in omnes scriptores.[116] Not without reason did Sarpi describe it as 'the finest secret which has ever been discovered for applying religion to the purpose of making men idiotic.'[117]

Index Expurgatorius sixty-one printing firms by name, all of whose publications were without exception prohibited, adding a similar prohibition for the books edited by any printer who had published the writings of any heretic; so that in fine, as Sarpi says, 'there was not a book left to read.' Truly he might well exclaim in another passage that the Church was doing its best to extinguish sound learning altogether.[118]

In order to gain a clear conception of the warfare carried on by Rome against free literature, it will be well to consider first the rules for the Index of Prohibited Books, sketched out by the fathers delegated by the Tridentine Council, published by Pius IV., augmented by Sixtus V., and reduced to their final form by Clement VIII. in 1595.[119] Afterwards I shall proceed to explain the operation of the system, and to illustrate by details the injury inflicted upon learning and enlightenment.