In 1803 the Bishopric of Fulda, of which Oberleichtersbach was a part, was secularized and given to Willem Frederik, Prince of Orange-Nassau. In 1806, after his defeat at the Battle of Jena–Auerstedt, the Principality of Nassau-Orange-Fulda was absorbed into France and its vassal state Grand Duchy of Frankfurt. In the Congress of Vienna in 1815, it was given to Bavaria.