In this alternative reality Constantine the Great never embraces the Christianity and the Roman Empire remains polytheistic.

So I would to know what realistic change(s) could have prevented the spreading of Christianity in the Roman Empire ?

In this alternative reality Constantine the Great never embraces the Christianity and the Roman Empire remains polytheistic.

So I would like to know what realistic change(s) could have prevented the spread of Christianity in the Roman Empire ?

In this alternative reality Constantine the Great never embraces the Christianity and the Roman Empire remains polytheist.

So I would to know what could have prevented the spreading of Christianity in the Roman Empire ?

In this alternative reality Constantine the Great never embraces the Christianity and the Roman Empire remains polytheistic.

So I would to know what realistic change(s) could have prevented the spreading of Christianity in the Roman Empire ?