Roman Imperial Laws, Protecting and Against Jewish Belief From 329-553 In Byzantine Empire

 Nadene Goldfoot                                        

                         Romans outlawed reading the Mishnah, the Oral Law

What they call Mishnah, on the other hand, we prohibit entirely, for it is not included among the Holy Books, nor was it handed down from above by the prophets, but it is an invention of men in their chatter, exclusively of earthly origin and having in it nothing of the divine. Let them read the holy words themselves, therefore, in unfolding these Holy Books for reading, but without hiding what is said in them, on the one hand, and without accepting extraneous and unwritten nonsense they themselves had contrived to the perdition of the more simple minded, on the other hand. In consequence of this permission granted by us, those who adopt the Greek language and the other languages shall not be subjected to any penalty at all, neither shall they be hindered by any person, nor shall those who are called among them Archipherekitae [office now of uncertain authority], or possibly Presbyters [elders] or Didascaloi [teachers], have the license to hinder them from this by any deceits or excommunications, unless they would wish to be chastened for these deeds by corporal punishments as well as by loss of property, and obey us-who desire and command deeds better and more pleasing to God-against their will.

There were so many instances of another law coming up that I'll just list the devastating ones.  After Constantine, emperors continued to issue laws affecting the Jewish population, gradually restricting their rights and freedoms within the Byzantine Empire. Constantine had not stopped.

• Constantine (306-337 CE): Forbade Jews from proselytizing and punished those who molested converts to Christianity.
• Constantius II (337-361 CE): Outlawed intermarriage between Jews and Christians and prohibited Jews from owning or dealing in slaves.
• Theodosius II (408-450 CE): Published the Theodosian Code in 439 CE which systematically curtailed Jewish rights. It barred Jews from building new synagogues, holding public office, and imposed burdensome civic obligations.
• Justinian I (527-565 CE): Issued the Code of Justinian which further restricted Jewish rights, including denying them full citizenship, disqualifying them from holding public office, prohibiting them from testifying against Christians in court, and banning Hebrew prayer, according to Jewish Currents. 
These laws became entrenched in Europe and influenced the status of Jews for over a thousand years under the power of the Church. 

Resource:

https://www.jewishvirtuallibrary.org/byzantine-empire#:~:text=The%20temporary

%20expulsion%20of%20the,Empire%20in%20the%20fourth%20century.

https://www.ccjr.us/dialogika-resources/primary-texts-from-the-history-of-the-relation

ship/roman-laws