What was the Roman empire's views on Christianity at various points in its history? What caused them to change over time?

(write in 2-3 sentences

In the early days of the Roman Empire, Christianity was viewed with suspicion and persecution due to its monotheistic beliefs that challenged the imperial cult. However, over time, the empire's views towards Christianity began to change, particularly after the conversion of Emperor Constantine in the early 4th century. The Edict of Milan in 313 legalized Christianity, and it eventually became the official religion of the empire under Emperor Theodosius in 380.