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Pope Innocent VIII: Summis desiderantes, 5 December 1484
And, although our beloved sons Henricus Institoris and Jacobus Sprenger, of the order of Friars Preachers, professors of theology, have been and still are deputed by our apostolic letters as inquisitors of heretical pravity,
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We therefore, desiring, as is our duty, to remove all impediments by which in any way the said inquisitors are hindered in the exercise of their office, and to prevent the taint of heretical pravity and of other like evils from spreading their infection to the ruin of others who are innocent, the zeal of religion especially impelling us, in order that the provinces, cities, dioceses, territories, and places aforesaid in the said parts of upper Germany may not be deprived of the office of inquisition which is their due, do hereby decree, by virtue of our apostolic authority, that it shall be permitted to the said inquisitors in these regions to exercise their office of inquisition and to proceed to the correction, imprisonment, and punishment of the aforesaid persons for their said offences and crimes, in all respects and altogether precisely as if the provinces, cities, territories, places, persons, and offences aforesaid were expressly named in the said letter. And, for the greater sureness, extending the said letter and deputation to the provinces, cities, dioceses, territories, places, persons, and crimes aforesaid, we grant to the said inquisitors that they or either of them joining with them our beloved son Johannes Gremper, cleric of the diocese of Constance, master of arts, their present notary, or any other notary public who by them or by either of them shall have been temporarily delegated in the provinces, cities, dioceses, territories, and places aforesaid, may exercise against all persons, of whatsoever condition and rank, the said office of inquisition, correcting, imprisoning, punishing and chastising, according to their deserts, those persons whom they shall find guilty as aforesaid.
And they shall also have full and entire liberty to propound and preach to the faithful word of God, as often as it shall seem to them fitting and proper, in each and all of the parish churches in the said provinces, and to do all things necessary and suitable under the aforesaid circumstances, and likewise freely and fully to carry them out.