Bolesław III Wrymouth (; 20 August 1086Oswald Balzer was in favor of 1086 as the year of birth, in bases of the records of the oldest Polish source: Roczniki Świętokrzyskie and Rocznik kapitulny krakowski; O. Balzer: Genealogia Piastów, p. 119.K. Jasiński: Rodowód pierwszych Piastów, Poznań: 2004, pp. 185–187. . – 28 October 1138), also known as Boleslaus the Wry-mouthed, was the duke of Lesser Poland, Silesia and Sandomierz between 1102 and 1107 and over the whole of Poland between 1107 and 1138. He was the only child of Duke Władysław I Herman and his first wife, Judith of Bohemia.

Bolesław began to rule in the last decade of the 11th century, when the central government in Poland was significantly weakened. Władysław I Herman fell under the political dependence of the Count palatine Sieciech, who became the de facto ruler of the country. Backed by their father, Boleslaw and his half-brother Zbigniew finally expelled Sieciech from the country in 1101, after several years of fighting. After the death of Władysław I Herman in 1102, two independent states were created, ruled by Bolesław and Zbigniew.

Bolesław sought to gain Pomerania, which caused an armed conflict between the brothers, and forced Zbigniew to flee the country and seek military help from King Henry V of Germany. Bolesław punished Zbigniew by blinding him. This action caused outrage among supporters of Zbigniew, resulting in a political crisis in Poland. Bolesław once again gained the favor of his subjects with public penance and made a pilgrimage to the monastery of his patron, Saint Giles, in Hungary.

Bolesław, like Bolesław II the Generous, based his foreign policy on maintaining good relations with neighboring Hungary and Kievan Rus, with whom he forged strong links through marriage and military cooperation in order to break Poland's political dependence on Germany and Henry's vassal, the King of Bohemia, who in moments of weakness of Polish policy was forced to pay tribute in Silesia. These alliances had allowed Bolesław to effectively defend the country from invasion in 1109. Several years later, Bolesław skillfully took advantage of the dynastic disputes in Bohemia to ensure peace on the south-west border.

Bolesław devoted the second half of his rule to the conquest of Pomerania. In 1113, he conquered the northern cities along Noteć, which strengthened the border with the Pomeranians. In subsequent years, he took further steps toward the conquest of Pomerania. The resolution of the conflict with the Holy Roman Empire allowed Bolesław to subordinate Western Pomerania and incorporate Gdańsk Pomerania. The expeditions, carried out in three stages, ended in the 1120s with military and political successes. Integration of the newly annexed lands enabled Bolesław to build churches and begin the process of converting Pomerania. Bishop Otto of Bamberg confirmed the Christianization of Pomerania from 1123 onward.

In the 1130s, Bolesław participated in the dynastic dispute in Hungary. After an unexpected defeat, he was forced to make an agreement with Germany. The Congress of Merseburg of 1135 addressed the issues of Pomerania, Silesian (probably also Polish) sovereignty and the supremacy of the Archbishopric of Magdeburg over the Polish Church.

Bolesław was married twice. His first marriage, to the Kievan princess Zbyslava, gave him an excuse to intervene militarily in the internal affairs of Rus'. After her death, Bolesław married a German noblewoman, Salomea of Berg, which in some way was the cause of changes in Polish foreign policy: in the second half of his rule, the duke sought to restore diplomatic relations with his western neighbor.M. Plezia: Wstęp, [in:] Gallus Anonymus: Cronicae et gesta ducum sive principum Polonorum, pp. 27–31. His last, and perhaps most momentous act, was his will and testament known as "The Succession Statute" in which he divided the country among his sons, leading to almost 200 years of feudal fragmentation of the Polish Kingdom.

Bolesław III Wrymouth has been recognized by historiography as a symbol of Polish political aspirations until well into the 19th century.M. Spórna, P. Wierzbicki: Słownik władców Polski i pretendentów do tronu polskiego, p. 65; S. Trawkowski: Bolesław III Krzywousty [in:] A. Garlicki (ed.): Poczet królów i książąt polskich, p. 80; R. Grodecki, S. Zachorowski, J. Dąbrowski: Dzieje Polski średniowiecznej, vol. I, p. 158. He also upheld the independence of the Polish archbishopric of Gniezno, despite a temporary failure in the 1130s. Although he achieved undoubted successes, he committed serious political errors, most notably against Zbigniew of Poland, his half-brother. The crime against Zbigniew and his penance for it show Bolesław's great ambition as well as his ability to find political compromise.S. Trawkowski: Bolesław III Krzywousty [in:] A. Garlicki (ed.): Poczet królów i książąt polskich, p. 89.

Childhood Situation of Poland during the 1080s In 1086, the coronation of Vratislav II as King of Bohemia, and his alignment with László I, King of Hungary, threatened the position of the Polish ruler, duke Władysław I Herman.O. Balzer's genealogy doesn't mention the coronation of Vratislav II, but he places the traditional date given by the chronicles of Cosmas of Prague (15 June 1086) to the coronation of the first King of Bohemia; O. Balzer: Genealogia Piastów, p. 108. V. Novotny indicates that the Synod of Mainz took place in late April or May 1085; V. Novotny: Ceske dejiny. Diiu I cast 2. Od Bretislava I do Premysla I, Prague 1912, p. 245. He believes that Vratislav II's coronation as King of Bohemia and Poland took place on 15 June 1085, after the synod, and not in 1086, as reported by O. Balzer and Cosmas of Prague. Compare to W. Mischke: Poland Czech kings crown (in Polish) [available 24 August 2009], pp. 11–12, 27–29.Cosmas of Prague's affirmation about the coronation of Prince Vratislav II as King of Poland is disputed by many historians. Medievalists consider it a mistake of the chronicler; G. Labuda: Korona i infuła. Od monarchii do poliarchii, Kraków: 1996, p. 13. . A detailed argument over the supposed coronation of Vratislav II was presented by W. Mischke: Poland Czech kings crown (in Polish) [available 24 August 2009], pp. 11–29. M. Spórna and P. Wierzbicki believe that the message of Cosmas is authentic. As King of Poland, Vratislav II stemmed from the emperor's claim to sovereignty over the Polish homage (fief indirect, second-degree); M. Spórna, P. Wierzbicki: Słownik władców Polski i pretendentów do tronu polskiego, p. 496. Therefore, that same year Władysław I was forced to recall from Hungarian banishment the only son of Bolesław II the Bold and a rightful heir to the Polish throne, Mieszko Bolesławowic. Upon his return, young Bolesławowic accepted the over-lordship of his uncle and gave up his hereditary claim to the crown of Poland in exchange for becoming first in line to succeed him.R. Grodecki, S. Zachorowski, J. Dąbrowski: Dzieje Polski średniowiecznej, vol. I, pp. 127–128. In return, Władysław I Herman granted his nephew the district of Kraków.M. Spórna, P. Wierzbicki: Słownik władców Polski i pretendentów do tronu polskiego, p. 353; M. K. Barański: Dynastia Piastów w Polsce, p. 175. The situation was further complicated for Władysław I Herman by a lack of a legitimate male heir, as his first-born son Zbigniew came from a union not recognized by the church.R. Grodecki, S. Zachorowski, J. Dąbrowski: Dzieje Polski średniowiecznej, vol. I, p. 130.O. Blazer didn't include the mother of Zbigniew in the list of Władysław I Herman's wives. Jan Wagilewicz named her Krystyna; O. Balzer: Genealogia Piastów, p. 107. T. Grudziński believes that by 1080, Władysław I Herman was still unmarried. In contrast, many historians stated Zbigniew's mother was the first wife of duke Władysław I; K. Jasiński: Rodowód pierwszych Piastów, Poznań 2004, p. 164. . Today, it is widely accepted that the mother of Zbigniew was Przecława, a member of the Prawdzic family; see A. Nawrot (ed.): Encyklopedia Historia, Kraków 2007, p. 738. . With the return of Mieszko Bolesławowic to Poland, Władysław I normalized his relations with the kingdom of Hungary as well as Kievan Rus (the marriage of Mieszko Bolesławowic to a Kievan princess was arranged in 1088).M. K. Barański: Dynastia Piastów w Polsce, p. 178. These actions allowed Herman to strengthen his authority and alleviate further tensions in international affairs.Strengthening the Polish situation in the first years of the rule of Władysław I, he could refuse to pay tribute to Bohemia for Silesia. M. K. Barański: Dynastia Piastów w Polsce, p. 179.

Birth and naming

The lack of a legitimate heir, however, remained a concern for Władysław I and in 1085 he and his wife Judith of Bohemia sent rich gifts, among which was a life size statue of a child made of gold, to the Benedictine Sanctuary of Saint GilesThe cult of Saint Giles began to expand rapidly in Europe during the first half of the 11th century. Polish lands went through the clergy, or pilgrims going to Saint-Gilles and Santiago de Compostela; K. Maleczyński: Bolesław III Krzywousty, pp. 14–15. in Saint-Gilles, Provence begging for offspring.Władysław, by the grace of God Duke of the Polans, and Judith, his legitimate wife, send to Odilon, the venerable Abbot of Saint Giles, and all his brothers humble words of profound reverence. Learned that Saint Giles was superior to others in dignity, devotion, and that willingly assisted [the faithful] with power from heaven, we offer it with devotion these gifts for the intentions of our children and humbly beg for your holy prayers for our request. Gallus Anonymus: Cronicae et gesta ducum sive principum Polonorum, vol. I, cap. XXX, pp. 57–58.12th century chronicles mention that on the coffin of St. Giles was a golden image of some form. J. ed. Vielard: La guide du pèlerin de Saint-Jacques de Compostelle, XII-wieczny przewodnik pielgrzymów ST. Gilles, St. Giles 1938; M. K. Barański: Dynastia Piastów w Polsce, p. 179. The Polish envoys were led by the personal chaplain of Duchess Judith, Piotr.K. Maleczyński: Bolesław III Krzywousty, p. 13.

The date of birth of Bolesław is closely linked with the death of his mother, Judith. This fact is evidenced by contemporary sources: Gallus Anonymus in the Cronicae et gesta ducum sive principum Polonorum reported that Duchess Judith gave birth to Bolesław on the day of Saint Stephen, King of HungaryGallus Anonymus: Cronicae et gesta ducum sive principum Polonorum, vol. II. cap. I. p. 62. (whose feast since the 11th century was celebrated on 20 August). However, the Duchess's health never recovered from childbirth and she died on "the night of Nativity" (i.e., 24–25 December). Gallus did not note the year in his chronicle; Cosmas of Prague wrote in Latin in his Chronica Boëmorum ("Chronicle of Bohemians") that Bolesław was born three days before the death of Judith, who died on the VIII Calends of January (25 December) of 1085;Kosmasa Kronika Czechów., vol. II, cap. XXXVI, pp. 77–78. The Kalendarz krakowski said that Duchess Judith died on 24 December 1086,In 1637, on the tombstone of Judith at Kraków Cathedral was placed the date of her death as 24 December 1082, in clear contradiction to all known sources. O. Balzer: Genealogia Piastów., p. 104. and only indicated that the birth of Bolesław was in the same year;O. Balzer: Genealogia Piastów., p. 119. The Obituary of the Abbey of Saint-Gilles reported the death of Judith on 24 December 1086;K. Jasiński: Rodowód pierwszych Piastów., p. 165, footnote 59, p. 172. The Rocznik kapituły krakowskiej (closely related to the Kalendarz krakowski) placed the death of Judith on 24 December 1086.K. Jasiński: Rodowód pierwszych Piastów., p. 167.