Papal Letter, issued by Pope Innocent IV to the Bishop of Constance [Present-day Germany]: “Although, after careful deliberation, it was decreed in the sacred General Council that the Jews should be distinguishable from the Christians by their clothes, lest Christians and Jews be able to have sinful intercourse with women of the other faith, nevertheless, we have been informed, the Jews of your Province and Diocese do not observe this decree, and as a result they may dare to commit the sin of forbidden intercourse under the veiling of error. Wanting, however, that this statute should be rigorously observed, we, through Apostolic Letters, command Your Fraternity, if this is true, to compel the Jews to wear the sign so that by their clothes they may make themselves distinguishable from Christians. This you shall do by shutting them off from communication with the faithful, after due warning, but without the right of appeal.”
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.295. Researched by Dominik Jacobs 8/1/2019