Council of Trent: Session 25
Chapter 20
The Immunities, Liberty, and other Rights of the Church are recommended to Secular Princes.
The holy Synod being desirous that ecclesiastical discipline may not only be restored amongst the Christian people, but that it also may be for ever preserved sound and safe from all manner of adverse attempts; besides those things which It has ordained touching ecclesiastical persons, has thought fit, that Secular princes also be admonished of their duty; trusting that they,—as Catholics, whom God hath willed to be the protectors of holy faith and church,—will not only grant that to the church her own right be restored, but will also recall all their own subjects to due reverence towards the clergy, parish priests, and the superior orders; nor permit that their officers, or inferior magistrates, through any spirit of covetousness, or any heedlessness, violate that immunity of the church and of ecclesiastical persons, which, by the ordinance of God, and by the appointments of the canons has been established; but (see) that they render, conjointly with the princes themselves, due observance to the sacred constitutions of Sovereign Pontiffs and of Councils.
It ordains, therefore, and enjoins, that the sacred canons, and all the General Councils, as also all other apostolic ordinances, published in favour of ecclesiastical persons, of the liberty of the Church, and against the violators thereof,—all which It also renews by this present decree,—be exactly observed by all men. And for this cause It admonishes the emperor, kings, republics, princes, and all and each of whatsoever state and dignity they be, that, the more bountifully they are adorned with temporal goods, and with power over others, the more religiously should they respect whatsoever is of ecclesiastical right, as belonging especially to God, and as being under the cover of His protection; and that they suffer not such to be injured by any barons, nobles, governors, or other temporal lords, and above all by their own immediate officers; but punish those severely, who obstruct her liberty, immunity, and jurisdiction; being themselves an example to them in regard of piety, religion, and the protection of the churches, in imitation of those most excellent and religious princes their predecessors, who not only defended from all injury from others, but, by their authority and munificence, in a special manner advanced the interests of their own church. Wherefore let each one herein discharge his duty carefully; that so the divine worship may be devoutly celebrated, and prelates and other clerics remain, quietly and without hindrances, in their own residences and in the discharge of their duties, to the profit and edification of the people.
Chapter 21
In all things the authority of the Apostolic See shall remain untouched.
Lastly, the holy Synod declares, that all and singular the things which, under whatsoever clauses and words, have been ordained in this sacred Council, in the matter of reformation of morals, and ecclesiastical discipline, as well under the Sovereign Pontiffs, Paul III., and Julius III., of happy memory, as under the most blessed Pius IV., have been so decreed, as that the authority of the Apostolic See both is, and is understood to be, untouched thereby.