4th century

The 4th Century AD consists of the years 301-400. Events include:


 * Official New Testament cannon established. The Book of Revelation is included over the protests of John Chrysostom


 * Arianism develops in Egypt


 * Constantine the Great converts to Christianity in 312 AD


 * Edict of Milan legalized Christianity in the Roman Empire


 * First Council of Nicaea formulated the original Nicene Creed, 325 AD. The creed was, in part, a response to Arianism.


 * The Second Ecumenical Council revised the Nicene Creed, 381 AD. The revised creed is known as the Nicene-Constantinopolitan Creed.


 * Christianity becomes the state religion of the Roman Empire, 381 AD