Rudolf I was a Habsburg ruler and the first Habsburg elected as Holy Roman Emperor, laying the foundation for the Habsburg Monarchy's future dominance.
Frederick William I was a Prussian King known for his military prowess, economic reforms, and the creation of the famous Potsdam Giants regiment.
Emperor Henry IV was a Holy Roman Emperor and King of Germany whose reign was marked by conflicts with the papacy and his own family.
Bolesław I the Brave was a medieval Polish king who fearlessly expanded his kingdom and secured its independence.