Mar. 1, 1274

Papal bull “Turbato Corde,” issued by Gregory X to the friars of the Dominican and Francisan Orders who are or will be deputized by the Holy See as inquisitors of heresy [Present-day Austria, Germany, Belgium, France, Italy, Spain, Switzerland, Liechtenstein, Andorra, Monaco, Netherlands, Vatican, Czech Republic, Slovakia, Luxembourg]: “It troubles the heart, what we heard and now relate, that not only have certain Jews who had recognized their error in the light of the Christian faith and converted, reverted to their former unbelief, but a number of others, born Christians, have converted to Judaism, and so blasphemed the name of Christ. Since a plague of this sort must be stopped quickly by appropriate means, you are ordered to proceed against suspect Jews and Christians in the prescribed manner for seeking out heretics and their collaborators. Jews responsible for leading Christians to their execrable rite must be punished as is fitting. The aid of the secular arm may be invoked as necessary.”
Grayzel, Solomon. The Church and the Jews in the XIIIth Century, Volume II (1254-1315). The Jewish Theological Seminary of America: New York, 1989. Page 122. Researched by Dominik Jacobs 10/28/2019