States of Germany
The Principality of Lichtenberg () on the Nahe River was an exclave of the Duchy of Saxe-Coburg-Saalfeld from 1816 to 1826 and the Duchy of Saxe-Coburg and Gotha from 1826 to 1834, when it was sold to the Kingdom of Prussia. Today its territories lie in two States of Germany – the District of St. Wendel in Saarland and the District of Birkenfeld in Rhineland-Palatinate.