** Diet of Finland, the legislative assembly of the Grand Duchy of Finland from 1809 to 1906

** Duchy of Cieszyn

** Brunswick-Wolfenbüttel, a branch principality ( 1269-1815 ), became the Duchy of Brunswick

** County, Duchy and Grand Duchy of Luxembourg, historical delineations

** James Stanley, Lord Strange ( 1716 – 1771 ), Chancellor of the Duchy of Lancaster, son of 11th Earl and father of 12th Earl.

** Saxe-Weimar-Eisenach ( Grand Duchy of Saxony, Ernestine branch )

** Chancellor of the Duchy of Lancaster, an ancient office of state, the Chancellor being the Minister of the Crown responsible in theory for the running of the Duchy of Lancaster, a duchy in England belonging to the Crown but historically maintained separately from the rest of the kingdom, whose net revenues belong to the monarch personally.

** The Chancellor of Cornwall, Keeper of the Great Seal, second only to the Lord Warden of the Stannaries within the Duchy.

** Valais witch trials-1428-1447, Duchy of Savoy

** the Duchy of Normandy for his elder son John.

** the Duchy of Orléans for his younger son Philip.

** In 1363, John II granted the Duchy of Burgundy to his fourth son Philip.

** the Duchy of Orléans and the County of Angoulême to his brother Louis in 1392.

** The Duchy of Anjou and the Counties of Maine, Perche, and Senonches to his second surviving grandson, Louis Stanislas, comte de Provence in 1771.

** Anna Kańtoch, Duchy w maszynach

** Partitions of the Duchy of Pomerania

** Duchy of Milan

** Duchy of Savoy

** Duchy of Urbino

** Duchy of Savoy, that ruled there in the Middle Ages

** Duchy of Styria ;

** Duchy of Carinthia ;

** The Kingdom of Prussia became part of the German Empire.

** Crown Prince Wilhelm of Prussia ( b. 1882 )

** WWII: The Battle of Königsberg, in East Prussia, ends.

** Frederick William III of Prussia ( Prussia )

** Otto von Bismarck becomes prime minister of Prussia.

** Constitution of the North German Confederation comes into effect, creating a confederation of states under the leadership of Prussia and Otto von Bismarck.

** Prussia declares war against France.

** Prince Waldemar of Prussia ( b. 1868 )

** Albrecht Graf von Roon, Prime Minister of Prussia ( d. 1879 )

** Wilhelmine of Bayreuth, daughter of Friedrich Wilhelm I of Prussia ( b. 1709 )

** HM The Princess Sophia Dorothea, Queen in Prussia ( 1687 – 1757 )

** 12th brigade under Prince Augustus of Prussia,

** Alexandra Feodorovna ( Charlotte of Prussia ) ( 1798 – 1860 ), wife of Nicholas I of Russia

** List of rulers of Prussia

** King of Prussia, Pennsylvania

** King of Prussia Mall

** Seven Years ' War pits Great Britain, Prussia and Hanover against France, Austria, Russia, Sweden, and Saxony

** Evacuation of East Prussia

** Kaliningrad oblast of Russia ( former Northern East Prussia )

** East Prussia ( PL, RU )

** New East Prussia ( PL )

** Royal Prussia ( PL )

** South Prussia ( PL )