1732 - 1748

Johann Nepomuk Karl (born 1724, died 1748), who was only eight years old when his father died, grew up under the guardianship of his uncle, Prince Josef Wenzel. In accordance with the rank of his House, his uncle prepared him for the assumption of government duties by means of a thorough education.

Likely as part of this preparation, Johann Nepomuk Karl accompanied his uncle on his mission to Paris. In 1745, Johann Nepomuk then assumed the regency. He proved himself to be eccentric, however, and lacked economic talent.
Three years later, shortly after his appointment as royal Hungarian and royal Bohemian treasurer, the Prince died at the age of only 24.