Under

Constantine the Great Constantine I ( , ; la, Flavius Valerius Constantinus, ; ; 27 February 22 May 337), also known as Constantine the Great, was Roman emperor from AD 306 to 337. He was the first emperor to convert to Christianity. Born in Naissus, Dacia Med ...

Jewish clergy were given the same exemptions as Christian clergy. Constantine, however, supported the separation of the date of

Easter Easter,Traditional names for the feast in English are "Easter Day", as in the '' Book of Common Prayer''; "Easter Sunday", used by James Ussher''The Whole Works of the Most Rev. James Ussher, Volume 4'') and Samuel Pepys''The Diary of Samue ...

from the Jewish

Passover Passover, also called Pesach (; ), is a major Jewish holiday that celebrates the Biblical story of the Israelites escape from slavery in Egypt, which occurs on the 15th day of the Hebrew month of Nisan, the first month of Aviv, or spring. ...

(see also

Quartodecimanism Quartodecimanism (from the Vulgate Latin ''quarta decima'' in Leviticus 23:5, meaning fourteenth) is the practice of celebrating Easter on the 14th of Nisan being on whatever day of the week, practicing Easter around the same time as the Passove ...

), stating in his letter after the

First Council of Nicaea The First Council of Nicaea (; grc, Νίκαια ) was a council of Christian bishops convened in the Bithynian city of Nicaea (now İznik, Turkey) by the Roman Emperor Constantine I in AD 325. This ecumenical council was the first effort ...

(which had already decided the matter):

"... it appeared an unworthy thing that in the celebration of this most holy feast we should follow the practice of the Jews, who have impiously defiled their hands with enormous sin, and are, therefore, deservedly afflicted with blindness of soul ... Let us then have nothing in common with the detestable Jewish crowd; for we have received from our Saviour a different way."

Theodoret Theodoret of Cyrus or Cyrrhus ( grc-gre, Θεοδώρητος Κύρρου; AD 393 – 458/466) was an influential theologian of the School of Antioch, biblical commentator, and Christian bishop of Cyrrhus (423–457). He played a pi ...

's ''Ecclesiastical History'' records ''The Epistle of the Emperor Constantine, concerning the matters transacted at the Council, addressed to those Bishops who were not present'':

"It was, in the first place, declared improper to follow the custom of the Jews in the celebration of this holy festival, because, their hands having been stained with crime, the minds of these wretched men are necessarily blinded. ... Let us, then, have nothing in common with the Jews, who are our adversaries. ... Let us ... studiously avoiding all contact with that evil way. ... For how can they entertain right views on any point who, after having compassed the death of the Lord, being out of their minds, are guided not by sound reason, but by an unrestrained passion, wherever their innate madness carries them. ... lest your pure minds should appear to share in the customs of a people so utterly depraved. ... Therefore, this irregularity must be corrected, in order that we may no more have any thing in common with those parricides and the murderers of our Lord. ... no single point in common with the perjury of the Jews."

Anti-Judaic legislation

In 329 AD he issued laws prohibiting Jews to own Christian slaves, prohibited mixed marriages and punished by death conversion of Christians to Judaism. Richard Gottheil, Hermann Vogelstein, "Constantine I" ''The Jewish Encyclopedia''
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References

Views of Judaism by individual Ancient Christian anti-Judaism Constantine the Great {{Jewish-hist-stub