Conciliar Decree (Canon 11), issued by the Council of Trier [Present-day Germany]: §11. “[…] we order the lords of the land to compel their Jews, and force them to this by some punishment, not to occupy themselves with medicine, nor to give any kind of potion to Christians.”
Grayzel, Solomon. Church And the Jews In the XIIIth Century: a Study of Their Relations During the Years 1198-1254, Based On the Papal Letters And the Conciliar Decrees of the Periods. The Dropsie College for Hebrew and Cognate Learning: Philadelphia PA, 1933. P.319. Researched by Dominik Jacobs 8/1/2019