Editing Bolesław III Wrymouth (section)

==Last years and death==

===Normalization of relations with his neighbors===
After coming under the imperial sphere of influence, Poland normalized its relations with Bohemia at the Congress of [[Kłodzko]] on 30 May 1137 (the so-called ''Peace of Kłodzko''), but the details of this agreement are unknown.<ref name="Szczur, p. 127">S. Szczur: ''Historia Polski – średniowiecze'', p. 127.</ref> This treaty was confirmed in the town of [[Niemcza]], where Władysław, the eldest son of Bolesław, stood as godfather in the baptism of [[Wenceslaus II, Duke of Bohemia|Wenceslaus]], Soběslav I's son.<ref>R. Grodecki, S. Zachorowski, J. Dąbrowski: ''Dzieje Polski średniowiecznej'', vol. I, p. 154.</ref>
[[Image:Tomb of Wladislaus I Herman of Poland, Płock, Poland, April 2019 (1).jpg|thumb|right|180px|Sarcophagus of Bolesław III in [[Płock Cathedral]].]]
In the last years of his life, Bolesław's main concern was to arrange political marriages for his children in order to strengthen his relations with neighboring countries. In 1137 Bolesław reinforced his relations with the Kievan Rus' with the marriage of his son [[Bolesław IV the Curly|Bolesław]] with Princess [[Viacheslava of Novgorod|Viacheslava]], daughter of [[Vsevolod of Pskov|Vsevolod, Prince of Pskov]]. In the year of his death, he finally normalized his relations with Hungary through the marriage of his son [[Mieszko III the Old|Mieszko]] with Princess [[Elizabeth of Hungary, Duchess of Greater Poland|Elizabeth]], daughter of King [[Béla II of Hungary|Béla II]].<ref name="Szczur, p. 127"/>

===Death===
{{Further|History of Poland during the Piast dynasty#Fragmentation of the realm (1138–1320)}}
Bolesław III Wrymouth died on 28 October 1138, probably in the town of [[Sochaczew]].<ref>L. Fabiańczyk: , p. 74.</ref> There are no records about the circumstances of his death, and twelfth-century sources don't provide information about his place of burial. It was only in the 15th century that [[Jan Długosz]] recorded that the duke's tomb was in the [[Masovian Blessed Virgin Mary Cathedral]] in [[Płock]]. He didn't reveal the source of this information, but it was presumably from the lost ''Rocznik mazowiecki''. Wawrzyniec Wszerecz, Canon of Płock during the 16th–17th centuries, wrote that Bolesław was in a common coffin at the cathedral, where the remains of his father Władysław I Herman and several other Piast Masovian rulers were also placed.<ref>K. Jasiński: ''Rodowód pierwszych Piastów'', pp. 187–188.</ref>  In his testament he divided his lands among his sons into five principalities.<ref name="Dabrowski 2014">{{Cite book |last=Dabrowski |first=Patrice M. |url={{GBurl|id=X__-DwAAQBAJ}} |title=Poland. The First Thousand Years |date=2014 |publisher=Cornell University Press |isbn=978-1-5017-5740-2 |location=New York}}</ref>