|- | Reign || Of 1146 with 1173 |- | Dynasty || Piast |- | Parents || Boleslas III the Stop-Chest
Salome von Berg-Schelklingen |- | Wives || * Wierzchosława (1137), girl of Vsevolod II Olegovitch of Kiev
* Maria (v. 1160) |- | Children || with Wierzchosława
* Boleslas Bolesławowic (? - 1172)
with Maria
* Lech (v.1162-1186)
*? , girl |- | Birth date || 1120 |- | Birthplace || ? |- | Date of death || January 5th 1173 |- | Place of death || ? |- | Place of burial || Cathedral of Płock, Poland |- |} Boleslas IV Curly the (in Polish Bolesław IV Kędzierzawy ) (1120 - January 5th 1173) Duc of Poland of 1146 with is 1173, it is the son of Boleslas III the Stop-Chest and of Salome, the girl of the count Henri de Berg. It is dynasty of the Piasts.

The will of Boleslas III the Stop-Chest

Boleslas III Stop-Chest dies the October 28th 1138. Its will, written a few years and inspired before of the habits of Kiev, mark the beginning of the territorial dismemberment of the Poland. It shared its State between its four sons, each one receiving a hereditary duchy. Ladislas II the Outlaw receives the Silesia (with Wrocław like capital), Boleslas IV the Curly one receives the Mazovie and the Cujavie (with Płock like capital), Mieszko III the Old man receives the Large-Poland (with Poznań like capital), Henri receives the duchy of Sandomierz (with Sandomierz like capital). The elder one of the male representatives of the dynasty Piast, Ladislas II the Outlaw, becomes the princeps (or senior ) and for this reason, control surface also on the Petite Poland (with Cracow like capital), the Eastern Large-Poland with Gniezno and Kalisz, the Western Poméranie, the Eastern Poméranie as well as the area of Łęczyca and Sieradz (which must return to him after the death of Salome, the second marries his/her father). It is him which decides in last spring on the questions of foreign politics, concludes the treaties, declares the wars, has the right of nomination, is the chief and the supreme judge.

Casimir II the Juste, who had not been born during the drafting of the will, does not receive anything.

Boleslas IV and its brothers are opposed to Ladislas II

As of 1139, supported by his/her Salome mother and her young brothers, Boleslas IV is opposed to Ladislas II the Outlaw who wants to restore the union of Poland.

In 1141, Ladislas launches an offensive against his/her brothers and seizes several cities. Archbishop of Gniezno and of many Tycoon S, which estimates that a too great centralization of the capacity goes against their interests and to their influence, join in Boleslas and his/her young brothers to counter increasingly powerful Ladislas. In 1145, on the Pilica, the young people Duke S, supported by the tycoons, obtain a first victory over Ladislas which is obliged to recognize their legitimacy and to return part of the to them Fief of their Salome mother who has just died.

In 1146, Ladislas II, the Rus' of Prussian Kiev and the , launch triple attacks against Boleslas and its young brothers. Ladislas continues its countryside to the doors of Poznań. During the seat of the city, the new conquered territories revolt and the archbishop of Gniezno launches a Anathème against Ladislas, enemy of peace and combined with pagan . Too much presumptuous, Ladislas continues the head office of Poznań but its army is put in rout by important rebellious forces and it must be folded up on Cracow.

The reign of Boleslas IV the Curly one

Ladislas must be exiled in Saxony and Boleslas IV the Curly one of Mazovie succeeds to him as a princeps (duke of Cracow). Boleslas IV the Curly division the territory of Ladislas between Mieszko III the Old man and Henri de Sandomierz. In August 1146, Conrad III attacks the Silesia but it is stopped on the Oder. It agrees to recognize the new Polish sovereign in exchange of a financial arrangement and promise to submit itself to the imperial court for an arbitration. Boleslas IV will refuse the arbitration of the emperor, too occupied regulating internal problems to be able to impose it.

In 1148, the Guido cardinal, at the request of the wife of Ladislas II the Outlaw and its friends of the imperial court, goes to Poland and requires the return of Ladislas. Receiving a refusal of Boleslas, it launches an anathema against the dukes Polish and prohibited with the priests to take up their duties but the Polish clergy this order refuses. He asks Conrad III to intervene militarily in Poland but this one, under the threat of a new civil war, is unable to obey.

In 1151, Boleslas IV Curly the Marie her Agnieszka sister with Mstislav II which will become large prince de Kiev in 1167.

In 1157, after an ultimatum requiring the return of Ladislas II, Frederic Barberousse, the Saxon and the Czech launches their invasion of the Poland. The imperial troops cross Oder and lay down their conditions with Boleslas IV: Silesia for Ladislas II the Outlaw, of the money and the troops for the military countryside Italian of Frederic Barberousse. Boleslas IV the Curly one must recognize imperial suzerainty. In 1158, Boleslas IV cancels the treaty whereas Frederic Barberousse began his Italian countryside : no troops for the emperor, not of Silesia for Ladislas II the Outlaw.

In 1163, under the threat of a new attack of the Holy Germanic Roman Empire, Boleslas IV the Curly one offers to Silesia to wire of Ladislas II the Outlaw, Mieszko IV Legs Frays and Boleslas Ier Length, obliging them to give up all their hereditary rights and by keeping control of the important cities. In 1164, the two wire of Ladislas II the Outlaw consolidate their capacity and expel of Silesia the troops of Boleslas IV the Curly one. In 1166, the countryside of Boleslas IV the Curly one against the Prussian shows a failure and by the death of his/her brother Henri de Sandomierz. Henri de Sandomierz, who did not have children, had designated his young brother Casimir like heir. This heritage is disputed by the two older brothers who leave him only the small territory of Wiślica. In 1172, the tycoons try to convince Casimir to reverse his brother Boleslas IV but this one refuses.

Boleslas IV the Curly one dies the January 5th 1173. Mieszko III the Old man of Large-Poland succeeds to him as a princeps . Casimir, the younger brother who finally obtained the duchy of Sandomierz, becomes the tutor of Lech, the only son of Boleslas IV the Curly one.

See too

• History of Poland

• Piast