of the pontificate of our most Holy Father in Christ and our lord Pius IV., by divine providence Pope, the apostolic rescript was affixed and published in the Campo di Fiore, and on the doors of the Apostolic chancery, by us, Niccolo de Mattheis and Camillo Gherubini, ushers of our holy lord the Pope.
CONCERNING PROHIBITED BOOKS.
TEN RULES DRAWN UP BT THE FATHERS SELECTED BY THE SYNOD OF TRENT AND APPROVED BY POPE PIUS IV.
Rule I.
Let all the books which before the year 1515 were condemned, whether by the sovereign pontiffs or by œcumenical councils, and are not in this index, be considered to be condemnd after the same manner as they were formerly condemned.
Rule II.
The books of arch-heretics, as well of those who invented or excited heresies after the year above mentioned, as of those who are or were the heads or leaders of heretics, such as Luther, Zuinglius, Calvin, Balthazar, Pacimontanus, Swenchfeldius, and such like, of what name, title, or argument soever, are utterly prohibited. And the books of other heretics, such as professedly treat of religion, are altogether condemned. But such as do not treat of religion are permitted, after having been examined and approved by Catholic theologians, by order of the bishops and inquisitors. But Catholic books written as well by those who have afterwards fallen into heresy, as by those who after falling have returned to the bosom of the Church, being approved by the theological faculty of some Catholic University or by a general inquisition, may be permitted.
Rule III.
Versions also of ecclesiastical writings, which have hitherto been set forth by condemned authors, provided they contain
