This union was contracted in connection with the Ascanian efforts to support the Junior Dukes in opposition to King Conrad III of Germany, who supported the deposed High Duke Władysław II as legal ruler of Poland.

A rival of King Władysław I the Elbow-high to the Polish crown, John supported the Teutonic Knights in the Polish – Teutonic War from 1326 to 1332.

Also in 1404, Władysław held talks at Vratislav with Wenceslaus IV of Bohemia, who offered to return Silesia to Poland if Władysław supported him in his power struggle within the Holy Roman Empire.

In 1093, Ladislaus supported Duke Zbigniew's revolt against his father, Duke Władysław I Herman of Poland.

Władysław ensured that the officer corps was significantly large so that the army could be expanded ; introduced foreign ( Western ) infantry to the Polish Army, with its pikes and early firearms, and supported the expansion of the artillery.

Notable painters and engravers Władysław supported and who attended his royal court included Tommaso Dolabella Peter Danckerts de Rij, Wilhelm Hondius, Bartłomiej Strobel, and Christian Melich.

But at the same time, Soviet-oriented parties, especially the PPR, under Władysław Gomułka and Bolesław Bierut, held the balance of power, controlling Polish army and police, and being supported by the Red Army.

Furthermore, the blinded Włostowic fled to the Kievan Rus ', which had so far supported Władysław, and convinced them to break their alliance.

He was the eldest son of Władysław Odonic, Duke of Greater Poland by his wife Hedwig, who was probably daughter of Duke Mestwin I of Pomerania, or a member of the Premyslid dynasty ( a fact supported by the name given to her son, the first in the Piast dynasty who bear it ).

In 1244 Bolesław supported his brother in the conflict that broke out between the local nobility and the clergy led by the Bishop of Poznań Bogufał II for the privileges granted by Władysław Odonic in 1237.

In 1215 Władysław Spindleshanks ' position has been further weakened by the growth of the power of Archbishop Henry Kietlicz, who supported the provisions of IV Lateran Council, and the subsequent congress of the Junior princes in Wolbórz, where Leszek I the White, Konrad I of Mazovia, Władysław Odonic and Casimir I of Opole not only agreed to extend the economic and legal benefits for the Church, but also supported the claims of Odonic to obtain his rightful inheritance.

He often supported king Władysław IV Waza from the House of Vasa, arguing for increasing monarch power, although he was known for limiting and withdrawing his support if he knew it was impossible to win.

Nonetheless he was among the few who supported Władysław plans in late 1640s to wage an offensive war on the Ottoman Empire.

From 1644 he switched his alignment from pro-Habsburg to pro-French and supported the second marriage of King Władysław with Ludwika Maria Gonzaga.

After the death of Władysław IV in 1648 he supported the election of his half brother John Casimir and was instrumental in his election.

He sympathised with the Habsburg faction and supported Queen Cecylia Renata, Habsburg wife of Władysław.

After the death of Władysław IV he supported the election of his brother, Jan Kazimierz and supported him during the Swedish invasion The Deluge, even after his brother Krzysztof Opaliński defected to the Swedes in 1655.

Brothers Andrzej Artur Zamoyski and Władysław Stanisław Zamoyski, supported Polish movements aimed at regaining independence during the partitions period ; Władysław was exiled after participating in the November Uprising, and Andrzej, in the aftermath of the January Uprising.

His father, King Casimir IV, had him educated well concerning public affairs and when his brother Władysław, became king of Bohemia, Casimir became crown prince and heir-apparent to the throne of Poland.

' speech to his brother Władysław Szpilman in a Jewish Ghetto in Warsaw, Poland, during the Nazi occupation in World War II.

Opinions vary on whether Władysław played an active role in the plot to depose his brother or whether he was handed the authority simply because he was the most proper person, being the next in line in the absence of the king and his son Mieszko Bolesławowic.

Władysław abandoned the alliance with Hungary favored by his deposed brother, and joined the anti-Papal camp.

Although Władysław was formally Dux and an Overlord of Poland, in reality the barons who banished his brother used this victory to strengthen their position.

Władysław formed a friendship with Adam Kazanowski and his brother, Stanisław.

His older brother, and predecessor on the throne, was Władysław IV Vasa.

John Casimir for most of his life remained in the shadow of his brother, Władysław IV Waza.

Among the princes who participated were: his brother Bolesław, Casimir I of Kuyavia, Siemowit I of Masovia, Władysław of Opole and the host, Bolesław V the Chaste.

However, is known that Władysław Odonic took care properly for the upbringing of his offspring, evidenced by the fact that Bolesław, like his older brother Przemysł I, was able to read and write Latin.

Władysław Odonic died on 5 June 1239, and because Bolesław was a minor at that time, he remained under the custody of his brother Przemysł I.

Despite now he had his own district, Bolesław didn't pursue a foreign policy, who continue under the hands of his brother, a fact revealed during the dispute with Duke Casimir I of Kuyavia for the possession of Ladzka, who was given to him by Henry II the Pious as a dowry of his daughter Constance-Casimir I's second wife -; this decision wasn't recognized by Władysław Odonic's sons, but eventually they reconciled and even signed and an alliance with the Kuyavian Duke, which effectively ended with any attempt to change the ownership of the disputed land.

Among the princes who participated were: his brother Przemysł I, Casimir I of Kuyavia, Siemowit I of Masovia, Władysław of Opole and Bolesław V the Chaste.

Mestwin was a member of the Samborides dynasty, the son of Duke Sobiesław of Gdańsk and younger brother of Sambor I, whom he succeeded in Pomerelia by appointment of the Polish High Duke Władysław III Spindleshanks.

The murder stirred outrage through the land and led to the dethronement of King Bolesław II the Bold, who had to seek refuge in Hungary and was succeeded by his brother, Władysław I Herman.

His son Bolesław V was still a minor upon his father's death and the rule over Poland remained contested between Leszek's brother Konrad and his Greater Polish cousin Władysław III, until in 1232 Duke Henry I the Bearded of Silesia finally prevailed.

One year later ( 13 September 1195 ), the death of his only surviving brother Bolesław in the bloody Battle of Mozgawą left Władysław as the sole heir of Mieszko III.

At the age of 70 ( or 85, according to some sources ), he was too old to resume his struggle for the Lithuanian throne and more importantly had no support from the Council of Lords led by Jonas Goštautas ( Jan Gastold ), that in June 1440 elected Casimir Jagiellon, brother of Polish King Władysław III as Grand Duke.

There is evidence to suggest that Helena and her older brother Adolf were the results of an affair between Józefa and Prince Władysław Sanguszko, a wealthy and influential Polish nobleman.

She came to Poland at the age of five years as a lady in waiting to Marie Louise Gonzaga, the French-born Queen of Poland from 1645 to 1672, wife and consort to two Polish kings — Władysław IV Vasa and later his brother ( who succeeded him ) John II Casimir Vasa.

The Polish nobles were outraged and demanded that Švitrigaila acknowledged fealty to his brother Jogaila ( Władysław II Jagiełło ), King of Poland.

The Union of Vilnius and Radom of 1401 confirmed Vytautas's status as grand duke under Władysław's overlordship, while assuring the title of grand duke to the heirs of Władysław rather than those of Vytautas: should Władysław die without heirs, the Lithuanian boyars were to elect a new monarch.

The next year Henry's ally Władysław III Spindleshanks succeeded Leszek I as High Duke ; however as he was still contested by his nephew in Greater Poland, he made Henry his governor at Kraków, whereby the Silesian duke once again became entangled into the dispute over the Seniorate Province.

He began to follow a policy which was more independent from Bohemia, including in respect to friendly relations with his Upper Silesian cousin Duke Władysław of Opole and also with duke Przemysł II of Greater Poland.

In the next centuries Gniezno evolved as a regional seat of the eastern part of Greater Poland, and in 1238 municipal autonomy was granted by the duke Władysław Odonic.

The second castle of Opole was probably founded in the 14th century by duke Władysław Opolczyk, though some sources claim that it was originally a wooden stronghold of Opole's castellan dating into 12th century.

In 1409 it was a meeting place of King Władysław II Jagiełło, duke Vitautas and Tatar khan under the archbishop Mikołaj Trąba initiative within the preparation of the war with the Teutonic Knights.

Around 1125 Władysław married Agnes of Babenberg, daughter of Margrave Leopold III of Austria ; this union gave him a close connection with the Holy Roman Empire and the Kingdom of Germany: Agnes by her mother was a granddaughter of Emperor Henry IV and a half-sister of the Franconian duke Conrad III of Hohenstaufen, the later King of Germany.

In the first years of his government, young Bolesław remained under the strong influence of his mother Salomea and the Voivode Wszebor, who feared the ambition of his elder half-brother High Duke Władysław II ( the first-born son of the late duke by his first wife Zbyslava of Kiev ).

Lubliniec was established about 1270 by the Piast duke Władysław of Opole on the road leading from his residence Opole to Kraków.

Trzebnica itself was first mentioned in a 1138 deed, then held by the Polish voivode Peter Wlast and later seized by the Silesian duke Władysław II the Exile.

Both his uncle Duke Mieszko III the Old and his cousin Władysław III Spindleshanks from the Greater Polish branch of the royal Piast dynasty constested Leszek's right to be senior duke during this era.

On 26 February 1289, in front of the city gates of Siewierz, the allied forces of Władysław I the Elbow-high, then Duke of Kujawy and Mazovia, the future King of Poland, defeated the army of Henryk IV Probus, duke of Wrocław and Kraków.

Skwierzyna already held town privileges upon the death of the Piast duke Przemysł II of Greater Poland in 1296, renewed by the Polish king Władysław II Jagiełło in 1406.