Munich, Bayerische Staatsbibliothek  Clm 23560, fol. 1r
Decretales Gregorii noni, Book I
ca. 1350-1375

Jeremy Cohen, The Friars and the Jews: The Evolution of Medieval Anti-Judaism (Ithaca: 1982)
Walter Pakter, Medieval Canon Law and the Jews (Abhandlungen zur rechtwissenschaftlichen Grundlagenforschung 68; Ebelsbach: 1988)
Jeremy Cohen, Living Letters of the Law: Ideas of the Jew in Medieval Christianity (Berkeley-Los Angeles: 1999)

Decretals of Pope Gregory IX (1234)
De Iudaeis et Sarracenis et eorum servis
Book 5 title 6  (19 canons)
Popes Gregory I, Alexander III(5), Clement III(3), Innocent III(1) Fourth Lateran Council c.68

c.1, 2, 12, 19: Jews may not own Christian slaves or servants
c.3, 7: Jews may retain old synagoges but not build new ones
c.4: Jews must close doors and windows on Good Friday
c.5: Jewish converts may not be injured
c.8:
Christians may not be servants to Jews
c.9:
Jews may not be unwillingly baptized, nor punished without a court judgment, or plundered of their goods
 Sicut Iudaei (Alexander III, Clement III, Innocent III)?
c.14: Jews who strike clerics must be punished
c.15: 
Jews must wear "habitus" to distinguish them
Extravagantes communes 5.2.2
14th-15th Century, Pope John XXII
c.2: Baptized Jews' property should not be molested and their condition should not be worse than before their Baptism