Grand Duchy of the Lower Rhine
The Grand Duchy of the Lower Rhine (German: Großherzogtum Niederrhein), or simply known as the Lower Rhine Province (Provinz Niederrhein), was a province of the Kingdom of Prussia and existed from 1815 to 1822. It was formally incorporated into the Prussian state on 5 April 1815.
Source: Wikipedia — Grand Duchy of the Lower Rhine (CC BY-SA 4.0)