Did Christianity spread despite the torment from the romans?

It is thought that there were many isolated occasions of persecution of the Christians by the Roman authorities, but relatively few organized persecutions.

In most cases, the Christians were severely knocked down by the persecutions, but they appear to have quickly recovered afterwards, with the Church adopting the practice of allowing those who fell to be restored to fellowship after showing due signs of penitence.

After the first empire-wide persecution ended, that of Emperor Decius in 250, Christianity appears to have spread more rapidly than before. However, other factors could have played a role.

It is not clear exactly what happened in the Great Persecution (303-313) started by the edict of Emperor Diocletian. While this continued sporadically for 11 years, it would appear that the Christians resisted more strongly this time than they appear to have done during the persecution under Emperor Decius.

This final period of persecution saw emperors and caesars, one after another, giving up and conceding that they could not win the "war" they had declared against Christians.

It is difficult to separate this circumstance from the fact that around this time Emperor Constantine, who had charge of the western part of the Empire, decided to invoke the Christian god on his behalf, and a little later, Licinius joined with him to urge the Christians to pray for them, the empire, and for themselves.

The Church went from strength to strength after this.