Roman Empire before Jesus Christ and After Jesus Christ, Old Empire and Modern time, Religious and Political origins. History of Holy Roman Empire. Holy Roman Empire, German Heiliges Römisches Reich, Latin Sacrum Romanum Imperium,the varying complex of lands in western and central Europe ruled over first by Frankish and then by German kings for 10 centuries (800–1806). (For histories of the territories governed at various times by the empire. Full information is found in the book.