6. But if it is asked what matters the Apostolic See forbids to Jews living in the same cities as Christians, We will say that all those activities which are now allowed in Poland are forbidden; these We recounted above. There is no need of much reading to understand that this is the clear truth of the matter. It is enough to peruse decretals with the heading ; the constitutions of Our predecessors, the Roman Pontiffs Nicholas IV, Paul IV, St. Pius V, Gregory XIII and Clement VIII are readily available in the Roman Bullarium. To understand these matters most clearly, Venerable Brothers, you do not even need to read those. You will recall the statutes and prescripts of the synods of your predecessors; they always entered in their constitutions every measure concerning the Jews which was sanctioned and ordained by the Roman Pontiffs.