Friedrich II. - Der Staufer: Der ewige Kampf mit dem Papst Nov 16, 2019

Frederick II of Hohenstaufen was a highly significant German king and Holy Roman emperor. Raised in Sicily, he was a sponsor of science, a reformer, perhaps even the first modern ruler. But Frederick could also be a brutal tyrant. He had his son Heinrich rot in the dungeon, for his imperial honour went before everything else.