Abbreviations dating ad
(In the mid-seventeenth century the English “vulgar” took on a new definition of “coarse,” but it wouldn’t be until this “coarse/unrefined” definition would become more common in the 20th century that referring to the Vulgar Era would cease.)(1715).
As for the actual abbreviation, CE (Common Era) has been claimed to have been used as early as 1831, though I couldn’t find specifically in what work it is supposed to have appeared in.
Finally, in April of AD 311, by imperial decree, the Great persecution was put to an end even in the East.
A few years later, Constantine the Great (reigning from AD 306 to 337) publicly declared himself a Christian and Christianity began to transition into the dominate religion in the Roman Empire.
Although unlike English, Latin is not a word-order language, it is conventional in English writing for A.
(In Latin, it wouldn't matter whether it was written A.
This began simply via seizing Christian’s property, destroying their homes, burning all Christian texts, etc.
To cater to religious diversity, the abbreviations BCE (Before Common Era) and CE (Common Era) can be used to replace BC and AD.Previous to this, he had purportedly only advocated banning Christians from such things as the military and ruling body in hopes that would appease the gods.