If it weren't for Constantine it is quite likely that very few of us would have ever been inside a Christian Church.  The city he founded bore his name up until the lifetime of my Grandfather.  It is still the largest one in Europe.   Ten more emperors were to bear the name Constantine, and when Greece became an independent nation in modern times several of its kings were also called Constantine which remains a popular name there and elsewhere.  Aristocratic titles throughout Europe  hark back to ranks in Constantine's army. So it is natural to be curious about what a man who had so much influence on history was really like.