Battle of Lützen
He pursued a military career. Along with his mother and Mattias, he visited Austria in 1631 in order to meet his uncle the Emperor Ferdinand II. He fought in the Battle of Lützen during the Thirty Years' War but fled the scene. His elder brother, Grand Duke Ferdinando, reprimanded him for his conduct in a letter dated 14 July. He died from plague during the Siege of Ratisbon, 1634.