Original: Ruling in Germany and the Holy Roman Empire Although never Emperor, Henry I the Fowler, Duke of Saxony, was arguably the founder of this imperial dynasty, since his election as German king made it possible for his son, Otto the Great to take on the imperium.
Simplified: Although he was never Emperor, Henry I the Fowler, Duke of Saxony, was the founder of this imperial dynasty, since his election as German king made it possible for his son, Otto the Great to take on the imperium.