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.

Significantly, the bishopric of Prague, founded in 973 during the reign of Boleslaus II ( 967 – 99 ), was subordinated to the archbishopric of Mainz.

The Bishopric of Lubusz was founded in 1124-25 during the reign of Boleslaus III to counter and convert the Liutizi.

* 935 – Saint Wenceslas is murdered by his brother, Boleslaus I of Bohemia.

* 1264 – The Statute of Kalisz, guaranteeing Jews safety and personal liberties and giving battei din jurisdiction over Jewish matters, is promulgated by Boleslaus the Pious, Duke of Greater Poland.

* February 9 – Boleslaus III of Bohemia is restored to authority with armed support from Bolesław I the Brave of Poland.

* Silesia is incorporated into territory ruled by Boleslaus I of Poland.

One of the plates had already been broken by that time with only part of the inscription preserved: Liste est glaud ... h Bolezlai Duc ... (" This is a sword of ... Duke Boleslaus ..."); the inscription on the other plate continued: Cum quo ei Dn SOS Omnipotens Salvator auxiletur adsus partes amen (" With whom is the Omnipotent Lord and Savior, to help him against his enemies.

The full inscription read: Iste est gladius Principis et haeredis Boleslai Ducis Poloniae et Masoviae, Lanciciae (" This is a sword of Hereditary Prince Boleslaus, Duke of Poland, Masovia, and Łęczyca ").

The identity of this Duke Boleslaus is uncertain.

* Saint Adalbert of Prague is sent to Prussia by Boleslaus I of Poland.

* The city of Kraków is rebuilt by Boleslaus V of Poland after being nearly destroyed in the Tatar invasions in 1241.

This Burizlaf, however, may be Svyatopolk ( whose troops were commanded by the Polish king Boleslaus I ; the latter name is also rendered as Burizlaf in some sagas ) as well as Boris.

But Thietmar states that Boleslaus I of Poland firstly supported his son-in-law against Yaroslav in 1017, which is the date, according to the Russian Primary Chronicle, of Svyatopolk's first defeat by Yaroslav.

The first written mention of Chełmno is known from a document allegedly issued in 1065 by Duke Boleslaus II of Poland for the Benedictine monastery in Mogilno.

The first recorded usage of the term is attributed to Boleslaus George II of Halych.

The legend is especially indebted for its growth to the Jesuit historiographer Boleslaus Balbinus the " Bohemian Pliny ,", whose Vita beati Joannis Nepomuceni martyris was published in Prague, 1670.

She also bore two daughters, one of whom is named by Nestor the Chronicler as Predslava ( taken as a concubine of Boleslaus I of Poland, according to Gallus ).

The first historical mention of Davle is the founding of benedictine monastery of st. John the Baptist by Bohemian duke Boleslaus II in 999.

The strength of the two dynasties ' conflict is also demonstrated by the fact that Czech ( Přemyslid ) rulers initially refused to ransom Saint Adalbert's ( Slavnikid ) body from Prussians who murdered him, so it was purchased by Boleslaus I the Brave, king of Poland.

Boleslaus Balbinus, S. J., in his Vita b. Joannis Nepomuceni martyris gives the most rich account.

For his service to the Dukes of Greater Poland, most notably to Boleslaus the Pious and to Przemysł II he was awarded on January 8, 1294, with the village of Polanowo.

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

When Otto II died suddenly in 983 and was succeeded by the three-year old Otto III, Boleslaus II again supported Henry II in his bid for the German throne.

* Boleslaus III of Poland begins a war against his brother Zbigniew for control of Poland.

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

Boleslaus I and his army remained in Rus ' for several months, but later left for Poland.

In 1003, Boleslaw I conquered the Duchy of Bohemia, imprisoned its Přemyslid duke, Boleslaus III, and denied Henry II the oath of allegiance for the duchy.

Bolesław claimed the ducal throne for himself, invaded Bohemia in 1003 and took Prague without any serious opposition, ruling as Boleslaus IV for a little over a year.

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.

* Symphonische Legende vom Könige Boleslaus dem Kühnen und Bischof Stanislaus dem Heiligen ( im Jahre 1079 ) for orchestra ( composed 1894 ), publ.

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.

Abraham ben Jacob, who travelled in Eastern Europe in 965, remarks that Boleslaus II of Bohemia ruled the country " stretching from the city of Prague to the city of Krakow ".

Soběslav ( c. 950 – 1004 ) was the brother of Saint Adalbert of Prague, son of Střezislava and Slavník and a friend of Polish king, Boleslaus the Brave.

By his wife Drahomíra, a Hevellian princess, Vratislaus had at least two sons, Wenceslaus and Boleslaus, both of whom succeeded him as Bohemian dukes.

In the following months Boleslav's brothers Jaromir and Oldrich flee to Germany and place themselves under the protection of Henry II, Holy Roman Emperor, while Boleslaus III of Bohemia orders massacre of his leading nobles at Vyšehrad.

* Boleslaus II of Bohemia massacres the Slavnik's dynasty at Libice.

Boleslaus I helped Otto I crush an uprising of Slavs along the Lower Elbe in 953 and in 955 the two joined forces to defeat the Hungarians at the battle of Lechfeld.

The March of Moravia was given to Boleslaus I after the defeat of the Magyars at the Battle of Lechfeld in 955, but it was conquered into the Duchy of Poland by Bolesław I Chrobry in 999.

She married Vratislav I of Bohemia and gave birth to at least three children: Saint Wenceslas, Boleslaus I and Střezislava.

Boleslaus ' kinsman Vladivoj took the Czech throne, but he was an alcoholic who died within a year.