1511?-1553 16thcentury 2012i-031 apologetics biography christianheresies christianheretics christianity churchhistory dissenters doctrinal europe gnosticism history historyrusskai︠a︡pravoslavnai︠a︡t︠s︡erkovʹ italy michael persecution physicians religious religiousaspects religiousdisputations russia servetus spain theology unitarians wz100s4914g2011