Grand Duchy of Posen
The Grand Duchy of Posen (; ) was part of the Kingdom of Prussia, created from territories annexed by Prussia after the Partitions of Poland, and formally established following the Napoleonic Wars in 1815. Per agreements derived at the Congress of Vienna it was to have some autonomy. However, in reality it was subordinated to Prussia and the proclaimed rights for Polish subjects were not fully implemented. On 9 February 1849, the Prussian administration renamed the grand duchy to the Province of Posen. Its former name was unofficially used afterward for denoting the territory, especially by Poles, and today is used by modern historians to refer to different political entities until 1918. Its capital was Posen (). History Background Originally part of the Kingdom of Poland, this area largely coincided with Greater Poland. The eastern portions of the territory were taken by the Kingdom of Prussia during the Partitions of Poland; during the first partition (1772), Prussia took just the Netze District, the portion along the Noteć () river. Prussia added the remainder during the second partition in 1793. Prussia briefly lost control during the Kościuszko Uprising in 1794. It was initially administered as the province of South Prussia. The