When his father died Josef Nepomuk Karl was only eight and his relative Josef Wenzel ruled as regent. Josef Nepomuk Karl came of age in 1745 and thus took control of Liechtenstein's affairs. He died three years later at the age of 24 leaving no descendants.
Karl of Liechtenstein was elevated in 1608 to the hereditary rank of Prince and was therefore the first Prince of Liechtenstein.
Prince Johann Adam Andreas acquired the Lordship of Schellenberg in 1699 and the County of Vaduz in 1712.
In 1719, Emperor Karl VI united Vaduz and Schellenberg and elevated them to the rank of Imperial Principality of Liechtenstein, establishing the Principality of Liechtenstein.