 After the French were driven out in 1814, the Congress of Vienna established a new political order in post-Napoleonic Europe.In 1816, Merzweiler thus passed to the Principality of Lichtenberg, a newly created exclave of the Duchy of Saxe-Coburg-Saalfeld, which as of 1826 became the Duchy of Saxe-Coburg and Gotha.As part of this state, it passed by sale in 1834 to the Kingdom of Prussia, which made this area into the Sankt Wendel district within the Rhine Province.