Grand Duchy of Posen

Grand Duchy of Posen
Großherzogtum Posen (German)
Wielkie Księstwo Poznańskie (Polish)
Client state of Prussia
1815–1848
Coat of arms of Grand Duchy of Posen
Coat of arms

The Grand Duchy of Posen (red) in 1848.
CapitalPoznań
Area
 • Coordinates52°24′N 16°55′E / 52.400°N 16.917°E / 52.400; 16.917
 
• 1848
28,951 km2 (11,178 sq mi)
Population 
• 1848
1,350,000
Government
 • TypeAbsolute Monarchy
Grand Duke 
• 1815–1840
Frederick William III
• 1840–1848
Frederick William IV
Governor 
• 1815–1830
Antoni Radziwiłł
• 1830–1841
Eduard von Flottwell
• 1841–1848
Adolf von Arnim-Boitzenburg
LegislatureSejm
History 
9 June 1815
19 March 1848
5 December 1848
Preceded by
Succeeded by
Duchy of Warsaw
Province of Posen

The Grand Duchy of Posen (German: Großherzogtum Posen; Polish: Wielkie Księstwo Poznańskie) 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 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 (Polish: Poznań).


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