What changes in the position of Christians took place under Constantine?

Constantine the Great Emperor of the Roman Empire, after defeating the usurper Maxentius, issued a decree according to which freedom of religion was established throughout the empire. Thus, Christianity acquired an official status, ceasing to be a dangerous sect for Roman society. Persecution of Christians at the state level ceased. However, the official religion of the Roman Empire was still paganism. Constantine himself was a pagan until his death, having adopted a new faith just before his death.