Prussian Homage ( painting ) | Prussian Homage: Albert and his brothers receive the Duchy of Prussia as a fief from Polish King Sigismund I the Old, 1525.

He is one of the figures on the Prussian Homage painting by Jan Matejko.

* April 10 – Albert of Prussia commits Prussian Homage.

Prussian Homage ( painting ) | Prussian Homage, by Jan Matejko, 1882.

This was called the " Prussian Homage ".

In 1525, the Order was ousted from East Prussian territory by its own Hochmeister when Albert, Duke of Prussia adopted Lutheranism and assumed the title of duke as hereditary ruler under the overlordship of Poland in the Prussian Homage.

Albert established himself as the first duke of the Duchy of Prussia and a vassal of the Polish crown by the Prussian Homage.

On April 10, 1525 Albert resigned his position, became a Protestant, and in the Prussian Homage was granted the title " Duke of Prussia " by his new feudal overlord, King Sigismund I the Old of Poland, who was also his uncle.

Charles V, Holy Roman Emperor, and Pope Clement VII objected to the Prussian Homage, which was derided as the Krakauer Kuhhandel (" Cracow horse-trading ").

The Prussian Homage ( painting ) | Prussian Homage ( by Jan Matejko, 1882, National Museum, Kraków ): Albert, Duke of Prussia | Albert receives eastern Prussia as a fief from King Sigismund I the Old | Sigismund I of Poland in 1525.

Prussian Homage ( painting ) | The Prussian Homage by Jan Matejko

A pensive Stańczyk in a detail of Matejko's The Prussian Homage

" The Prussian Tribute in Moscow ", satirical newspaper " Mucha ", September 8, 1939, Warsaw

During World War II, " The Prussian Tribute ", the famous Polish painting by Jan Matejko, was transferred secretly from Kraków and hidden in the vault of the church to protect it from the Nazis.

Other paintings in this group include Unia Lubelska ( Union of Lublin ) ( 1869 ), Stefan Batory pod Pskowem ( Stefan Batory at the siege of Pskov ) ( 1872 ), Kopernik ( Nicolaus Copernicus ), Dzwon Zygmunta ( Sigismund's Bell ) ( 1874 ), Hołd Pruski ( Prussian Tribute ) ( 1882 ), Sobieski pod Wiedniem ( Jan III Sobieski at the Battle of Vienna ) ( 1883 ), Wernyhora, Kościuszko pod Racławicami ( Tadeusz Kościuszko at the battle of Racławice ) ( 1888 ), Dzieje Cywilizacji w Polsce ( History of civilization in Poland ) ( 1889 ) and Konstytucja 3 Maja ( Constitution of the 3 May ) ( 1891 ).

Carl Philipp Gottfried von Clausewitz (; July 1, 1780 – November 16, 1831 ) was a Prussian soldier and military theorist who stressed the moral ( in modern terms, " psychological ") and political aspects of war.

Olsztyn (; Old Polish: Holstin ; Old Prussian: Alnāsteini ; ) is a city on the Łyna River in northeastern Poland.

The Duchy of Prussia or Ducal Prussia (; ; ; ; Old Prussian: Ercōgista Prūsija ) was a duchy in the eastern part of Prussia from 1525 – 1701.

Gebhard Leberecht von Blücher, Fürst von Wahlstatt (; December 16, 1742 – September 12, 1819 ), Graf ( Count ), later elevated to Fürst ( Prince ) von Wahlstatt, was a Prussian Generalfeldmarschall ( field marshal ) who led his army against Napoleon I at the Battle of the Nations at Leipzig in 1813 and at the Battle of Waterloo in 1815 with the Duke of Wellington.

The Łyna (; ; ; Old Prussian: Alnā ), or Lava (), is a river in northern Poland's Warmian-Masurian Voivodeship as well as in Russia's Kaliningrad Oblast.

The Prussian Settlement Commission (; ) was a Prussian government commission that operated between 1886 and 1924, but actively only until 1918.

Lithuania Minor (; ; ; ) or Prussian Lithuania (;, ) is a historical ethnographic region of Prussia, later East Prussia in Germany, where Prussian Lithuanians or Lietuvininkai lived.

Reszel (; Prussian: Resel or Resl ) is a town in Poland in the Warmian-Masurian Voivodeship.

Vang stave church (; ; ) is a stave church which was bought by the Prussian King and transferred from Vang in Norway and re-erected in 1842 in Brückenberg near Krummhübel in Germany, now Karpacz in the Karkonosze mountains of Poland.

The baneful influence of these antiquated principles was clearly shown in the maintenance of Königgratz-Josefstadt in 1866 as a strategic point, which was preferred to the defeat of the separated Prussian armies, and in the strange plans produced in Vienna for the campaign of 1859, and in the almost unintelligible Battle of Montebello in the same year.

He was the second and last Prussian duke of the Ansbach branch of the Hohenzollern family.

With the coronation of Frederick I in 1701 as king ( in Königsberg ), Berlin became the new capital of the Kingdom of Prussia ( instead of Königsberg ); this was a successful attempt to centralize the capital in the very outspread Prussian Kingdom, and it was the first time the city began to grow.

Marlborough's anxiety was finally allayed when, just past noon, Colonel Cadogan reported that Eugene's Prussian and Danish infantry were in place – the order for the general advance was given.

Ten infantry colours were lost to the Bavarians, and hundreds of prisoners taken ; it was only through the leadership of Eugene and the Prussian Prince that the Imperialist infantry were prevented from abandoning the field.

However, the Prussian infantry was not there.

Although the various Baltic tribes were mentioned by ancient historians as early as 98 B. C., the first attestation of a Baltic language was in about 1350, with the creation of the Elbing Prussian Vocabulary, a German to Prussian translation dictionary.

The dye Prussian blue was first accidentally made around 1706, by heating substances containing iron and carbon and nitrogen.

Clausewitz's father was once a lieutenant in the Prussian army and held a minor post in the Prussian internal revenue service.

At the Battle of Jena-Auerstedt on October 14, 1806 – when Napoleon invaded Prussia and defeated the massed Prussian-Saxon army commanded by Karl Wilhelm Ferdinand, Duke of Brunswick – he was captured, one of the 25, 000 prisoners captured that day as the Prussian army disintegrated.

In 1815, the Russo-German Legion was integrated into the Prussian Army and Clausewitz re-entered Prussian service.

His conclusions were influenced by his experiences in the Prussian Army, which was often in an intelligence fog due partly to the superior abilities of Napoleon's system but even more to the nature of war.

In 1209, Christian was commissioned by the Pope to be responsible for the Prussian missions between the Vistula and Neman Rivers and in 1212 he was appointed bishop.

His seat as a bishop remained at Oliwa Abbey on the western side of the Vistula, whereas the pagan Prussian ( later East Prussian ) territory was on the eastern side of it.

Duke Konrad of Masovia still was not capable to end the Prussian attacks on his territory and in 1224 began to conduct negotiations with the Teutonic Knights under Grand Master Hermann von Salza in order to strengthen his forces.

It was regarded as a Protestant custom by the Roman Catholic majority along the lower Rhine, and was spread there only by Prussian officials who were moved there in the wake of the Congress of Vienna in 1815.

* 1454 – In the Thirteen Years ' War, the Secret Council of the Prussian Confederation sends a formal act of disobedience to the Grand Master.

* February 4 – In the Thirteen Years ' War, the Secret Council of the Prussian Confederation sends a formal act of disobedience to the Grand Master.

14 January 1945 saw the Normandie-Niemen start its third campaign ( from Dopenen to Heiligenbeil ), concentrating in the East Prussian part of the German Reich, until the formal announcement of victory in the east on 9 May the day after V-E Day in Europe.

It remained under Polish ( and briefly Swedish ) suzerainty and the rulers of Brandenburg had to swear – in the role as Prussian duke – formal allegiance to the Polish Crown.

The organizational structure of the Diet reflected both Prussian and British influences, most notably in the inclusion of the House of Peers ( which resembled the Prussian Herrenhaus and the British House of Lords ), and in the formal Speech from the Throne delivered by the Emperor on Opening Day.

On 18 April 1846 he took his seat as a member of the Bavarian Reichsrat, and the following 26 June he received his formal discharge from the Prussian service.

There was a genuine and widespread sense of loss and mourning amongst ordinary Germans when she died and her funeral was marked by much spontaneous public grieving, as well as the more formal rituals of the Prussian State.

The prestigious Prussian Academy of Sciences took on formal development of the DWB in 1908 with Göttingen remaining a central collection point for source documents.

The Preußenschlag was declared partially unconstitutional on October 25, 1932 by the German Constitutional Court, but only in so far as the formal existence of the Prussian cabinet was concerned.

With the formal dissolution of the State of Prussia in 1947, support for the library ended and the Prussian State Library ceased to exist.