Poznań's cathedral was the place of burial of the early Piast monarchs ( Mieszko I, Boleslaus I, Mieszko II, Casimir I ), and later of Przemysł I and King Przemysł II.

* June 21 – King Boleslaus V of Poland ( d. 1279 )

* 1264 – King Boleslaus V of Poland promulgates legal protection for his Jewish subjects, including protection from the kidnapping and forcible baptism of Jewish children.

A legend links Szczerbiec with King Boleslaus the Brave who was said to have chipped the sword by hitting it against the Golden Gate of Kiev ( now in Ukraine ) during his capture of the city in 1018.

* King Boleslaus V of Poland promulgates legal protection for his Jewish subjects, including protection from the kidnapping and forcible baptism of Jewish children.

* December 7 – King Boleslaus V of Poland ( b. 1226 )

During the reign of King Boleslaus the Brave, there was a fortified settlement here, which protected the ford across the Warta on an important trade route from Silesia to Poznań.

Boleslaus was succeeded by Boleslaus III, his eldest son by his first wife Adiva, perhaps the daughter of Edward the Elder, King of England, who married " a prince near the Alps ".

In 1003, he rebelled against his elder brother Boleslaus III, who had him emasculated, but was unable to secure the throne, which was subsequently taken by Bolesław the Brave, King of Poland.

In 1025, Duke Boleslaus I the Brave was crowned King of Poland, marking the starting date for a Polish Kingdom, though for long years the Poles were ruled not by Kings but by Dukes.

In 1132, King Boleslaus III of Poland led a campaign with Rus ' and Polish troops on Boris ' behalf.

King Boleslaus and Boris were defeated near the Sajó River on 22 July, but Boris was to prove a persistent claimant for a number of years to come.

* 1770 – James Cook names and lands on Possession Island, Queensland and claims the east coast of Australia as New South Wales in the name of King George III.

* 1457 BC – Likely date of the Battle of Megiddo between Thutmose III and a large Canaanite coalition under the King of Kadesh, the first battle to have been recorded in what is accepted as relatively reliable detail.

* 1772 – Gustav III of Sweden stages a coup d ' état, in which he assumes power and enacts a new constitution that divides power between the Riksdag and the King.

* 1331 – King Stephen Uroš III, after months of anarchy, surrenders to his son and rival Stephen Dušan, who succeeds as King of Serbia.

* 1772 – King Gustav III completes his coup d ' état by adopting a new Constitution, ending half a century of parliamentary rule in Sweden and installing himself as an enlightened despot.

In 1137 Conrad III, the Hohenstaufen King of the Germans, deprived Albert's cousin and nemesis, Henry the Proud of his Saxon duchy, which was awarded to Albert if he could take it.

His only legitimate child and son, by his second wife, Alexander III succeeded him as King of Scots.

Alexander III ( Medieval Gaelic: Alaxandair mac Alaxandair ; Modern Gaelic: Alasdair mac Alasdair ) ( 4 September 1241 – 19 March 1286 ) was King of Scots from 1249 to his death.

Alexander had married Princess Margaret of England, a daughter of King Henry III of England and Eleanor of Provence, on 26 December 1251.

The name's popularity was spread throughout the Greek world by the military conquests of King Alexander III, commonly known as " Alexander the Great ".

* Alexander the Great ( Alexander III of Macedon ), King of Macedon, 356 – 323 BC

During this time, Alexios was rumored to be the lover of Empress Maria of Alania, the daughter of King Bagrat IV of Georgia, who had been successively married to Michael VII Doukas and his successor Nikephoros III Botaneiates, renowned for her beauty.

During Alexius II's reign, the Byzantine Empire was invaded by King Bela III losing Syrmia and Bosnia to the Kingdom of Hungary in AD 1181, later even Dalmatia was lost to the Venetians.

* 1775 – American Revolutionary War: King George III delivers his Proclamation of Rebellion to the Court of St. James's stating that the American colonies have proceeded to a state of open and avowed rebellion.

* 1796 – The Armistice of Cherasco is signed by Napoleon Bonaparte and Vittorio Amedeo III, the King of Sardinia, expanding French territory along the Mediterranean coast.

In the papal bull Manifestis Probatum, Pope Alexander III acknowledged Afonso as King and Portugal as an independent crown with the right to conquer lands from the Moors.

Alfonso III ( 1265, Valencia – 18 June 1291 AD ), called the Liberal ( el Liberal ) or the Free ( also " the Frank ," from el Franc ), was the King of Aragon and Count of Barcelona ( as Alfons II ) from 1285.

Alfonso IV, called the Kind ( also the Gentle or the Nice, ) ( 1299, Naples – 24 January 1336 ) was the King of Aragon and Count of Barcelona ( as Alfonso III ) from 1327 to his death.

He also married a Greek princess named Ladice daughter of King Battus III and made alliances with Polycrates of Samos and Croesus of Lydia.

Alfonso the Magnanimous KG ( also Alphonso ; ; 1396 – 27 June 1458 ) was the King of Aragon ( as Alfonso V ), Valencia ( as Alfonso III ), Majorca, Sardinia and Corsica ( as Alfonso II ), and Sicily and Count of Barcelona ( as Alfonso IV ) from 1416 and King of Naples ( as Alfonso I ) from 1442 until his death.

He was the younger son of King Béla III of Hungary, who invested him with the government of the Principality of Halych.

Andrew was the second son of King Béla III and his first wife, Agnes of Antioch.

Nevertheless, when Prince Vladimir II Yaroslavich of Halych, who had been expelled from his country by his subjects, fled to Hungary seeking for assistance in 1188, King Béla III had him arrested and occupied his principality and he invested Andrew with Halych.

Gallus was a foreign monk who accompanied King Bolesław III Wrymouth in his return from Hungary to Poland.

The Polish ruler Bolesław III Wrymouth entered in an alliance with King Niels of Denmark against Wartislaw I, Duke of Pomerania ( now in northwestern Poland and northeastern Germany ).

In 1109, King Henry V of Germany, entangled in the fratricidal war between the Piast dukes Bolesław III Wrymouth and Zbigniew besieged the town, but could not overcome the Polish forces in the Battle of Głogów.

A knight called Wadwicz was dispatched twice in a delegation by King Boleslaw Krywousty or " Wrymouth ," 1102-1138.

What Gallus did write about himself may be summed up as follows: Before going to Poland, he likely spent some time in Hungary, where he met Polish King Bolesław III Wrymouth ; he was a pilgrim ; he revered Saint Giles ; and he knew little about Scandinavia.

The Duchy of Sandomierz was created in 1138 by King Bolesław III Wrymouth, who in his testament divided Poland into five principalities.

The ruler of Poland, Duke Bolesław III Wrymouth, in order to hold his ground against the Empire wanted to obtain a powerful ally against Lothair III of Supplinburg, who in 1125 had been elected King of the Romans against Duke Frederick II of Swabia.