However, most Christians weren’t too fond of Diocletian, since he brutally persecuted them in the latter part of his reign in the late third / early fourth century.This was in part a response to advice Diocletian received at the oracle of Apollo at Didyma.* "Duke" is the closest title we have found for the early rulers of Ch'in.It is commonly accepted that in 221 BC, at the time of the unification, Ch'in introduced the Pan (pronounced "Ban") Liang coinage, discontinuing knife and spade coinage.(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).
Afterward, he switched to an escalating policy of persecution to try to get Christians to worship the Roman gods.
This is often credited with not only popularizing the calendar reference, but also introducing the concept of BC, notably setting 1 BC to be the year prior to AD 1, ignoring any potential zero year.
(This is no surprise as Bede, like Dionysius, didn’t have a numeral zero to work with, see: The Story of Zero.
Traditionally we refer to the Ch'in Dynasty as beginning in 255 BC when the Ch'in conquered the Zhou.
Some date it to 221 BC when they finished unifying China (note this unified China was much smaller than the China we know today), but the Ch'in themselves probably would have used a date of about 325 BC when Duke Hsuan Wen adopted the title of Emperor after defeating the state of Wen and withdrew Ch'in allegiance to the Zhou.