Bolesław III Wrymouth

Bolesław III Wrymouth ( pl, Bolesław III Krzywousty; 20 August 1086 – 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 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 Prince sought to restore diplomatic relations with his western neighbor. 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. He also upheld the independence of the Polish archbishopric of Gniezno as King of Bohemia, and his alignment with László I, King of Hungary, threatened the position of the Polish ruler, Prince 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) vailable 24 August 2009 pp. 11–12, 27–29.Cosmas of Prague 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) vailable 24 August 2009 pp. 11–29. M. Spórna and P. Wierzbicki believe that 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. In return, Władysław I Herman granted his nephew the district of Kraków. 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. 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). These actions allowed Herman to strengthen his authority and alleviate further tensions in international affairs.

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 Giles in Saint-Gilles, Provence begging for offspring. The Polish envoys were led by the personal chaplain of Duchess Judith, Piotr.

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 in 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, 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.
* The ''Rocznik kapituły krakowskiej'' (closely related to the ''Kalendarz krakowski'') placed the death of Judith on 24 December 1086.

Historian August Bielowski established Bolesław's birth on 26 December 1085 and the death of his mother two days later, on 28 December. According to him Gallus Anonymus committed two errors. First, instead of "the Sunday after the Nativity of the Lord", he wrote incorrectly "in the Sunday of the Nativity". Secondly, he mistook the day of Saint Stephen (26 December) for the festivities of King Stephen of Hungary (20 August). Both corrections lead to the birth date of Bolesław on 26 December. This theory was supported by the fact that, in 1085, 28 December fell on a Sunday.K. Jasiński: ''Rodowód pierwszych Piastów.'', p. 166.

Oswald Balzer refuted Bielowski's theory, arguing that Judith's death was on the night of 24/25 December 1086, and the birth of Bolesław was four months before, on 20 August. According to him, this timing of Judith's death gives rise to possible discrepancies in determining the exact date of Bolesław's birth, but corroborates all known sources who placed the death of Judith. Gallus wrote that Judith died shortly after giving birth to a son. Later sources interpret this as a death in childbirth and Cosmas of Prague followed this fact, though he didn't receive the information firsthand. Hence, his mistake would result in this point. In contrast, the correct date of birth of Bolesław would be 20 August, as indicated by Gallus. In the medieval tradition the year began on 25 December. In that case, the reports of Cosmas allow us to conclude that Bolesław was born in 1085. This information, however, was contradicted by the ''Kalendarz krakowski'', which gave the year as 1086. Judith was styled by the authors of the ''Kalendarz'' as "regina Polonia" (''Queen of Poland'' in Latin), and this title could be associated with her father's coronation as King of Bohemia and Poland on 15 June 1086 (according to Cosmas). Karol Maleczyński refuted Balzer's date for the coronation of Vratislav II, the one given by Cosmas. However, most researchers indicate that the coronation took place on 15 June 1085, so Judith could have been called Queen a year earlier.

Karol Maleczyński determined that the death of Judith took place on the night between 24 and 25 December 1085, and Bolesław was born four months before, on 20 August. Researchers found that the date given by the ''Rocznik kapituły krakowskiej'' (24 December 1086) was the same established by Cosmas (25 December 1085). The difference in the year could be explained in the different style of dating followed by Cosmas, who began the year according to the Julian calendar on 1 January and Christmas (''Nativitate'' in Latin) on 25 December. According to Maleczyński, Kazimierz Jasiński failed to consider this calendar difference, which occurs only during the period of 25–31 December.

Archaeologist Wojciech Szafrański reassumed the theory of Bielowski: Judith of Bohemia died on 28 December 1085, and Bolesław was born two days before, on 26 December. According to Szafrański Cosmas used the term ''VIII Calends of January'', with no specific date. However, in the Chronicle of Gallus should read that Judith died ''on Christmas Day'', but ''on Sunday in the Octave of Christmas''. Using such a broadened range of days, the investigator determined the birth of Boleslaw in the feast of Saint Stephen (26 December). For this reasons, the date of 1085 given by Bielowski is correct according to him. However, Jasiński pointed the weaknesses of the argument of Szafrański because Gallus has written about the Octave, but specifically about Christmas night, but the investigator didn't consider all other sources, as well as the achievements of research in genealogy.

Marian Plezia argued that Bolesław was born on 2 September 1085 or 1086.K. Jasiński: ''Rodowód pierwszych Piastów.'', p. 186. According to Gallus, the day of King Stephen of Hungary was also celebrated on 2 September. Jasiński considered this theory unfounded. In Poland the feast of King Stephen of Hungary is pointed by the ''Kalendarz krakowski'' and the ''kalendarz Kodeksu Gertrudy'' on 20 August. Besides, if Bolesław was born on 2 September, Gallus probably would be noted that this was the day after the celebration of Saint Giles (1 September), which was attributed to be the intercessor of his birth.

Kazimierz Jasiński placed the death of Judith in the night between 24 and 25 December 1086 and the birth of Bolesław four months before, on 20 August. In this point he agrees with the findings of Balzer. He supported his views with additional arguments: All sources are based in the missing ''Rocznika kapituły krakowskiej'', and the next known text of this source refers to events in 1086. Cosmas, writing his chronicle a few decades later, probably benefited from oral tradition and could make a mistake when he placed the year. His reports who placed the birth of Bolesław three days before the death of his mother denoted a quite short time.

Today is widely recognized the view of both Jasiński and Balzer, that Bolesław most likely was born in the day of King Stephen of Hungary, 20 August 1086.
According to Cosmas of Prague, Bolesław was named after his uncle, Bolesław II the Generous. Władysław I Herman had no reason to named his first-born legitimate son after his brother, but probably in this way tried to placate the former allies of his predecessor.K. Jasiński: ''Rodowód pierwszych Piastów'', p. 184.

Bolesław's nickname "Wrymouth" (pl: ''Krzywousty'') appeared in Polish and Latin sources of the 13th century: ''Genealogii płockiej (Criwousti)'' and the ''Roczniku świętokrzyskim młodszym (Crzyvousti)''. Probably the origin of this nickname dates back on the 12th century and is relationed with some physical characteristics of the Polish ruler, who were noticed at the time of his reign. Probably he began to be named in this way after 1114, because Gallus Anonymus in his ''Chronicle'' never mentioned it. In the ''Kronice książąt polskich'' and ''Kronice polsko-śląskiej'' Bolesław was qualified by the Latin adjective ''curvus'', whose significance remains unclear. According to the 14th-century ''Kroniki o Piotrze Włostowicu'' the Prince was hunchbacked (Latin: ''gibbosus'') or had a crooked mouth. The 15th-century chronicler Jan Długosz wrote:

:: He had a mouth on one side slightly bent, and for this he was called Wrymouth; however, this is not marred his face, and even added to him some charm.Jan Długosz
''Jana Długosza kanonika krakowskiego Dziejów polskich ksiąg dwanaście'', vol I, p. 422. (in Polish)
etrieved 23 July 2014

In 1974, in the Masovian Blessed Virgin Mary Cathedral of Płock, where according to tradition Bolesław was buried, an archaeological research project was conducted. A coffin was discovered containing the bones of 16 men and women. One of the skulls, of a man who died aged 50, had a deformed mandible. There is a hypothesis that these remains belonged to Bolesław. Opponents of this theory suggest that the Prince was named in this way many years after his death, and his contemporary Gallus did not mention any physical defect in the hero of his Chronicles. The defenders of the hypothesis argue that the work of Gallus has the characteristics of a panegyric in honor of Bolesław, because the chronicler did not mention his physical infirmities. It is also speculated that the bone damage occurred as a result of childbirth complications, which led to the death of his mother a few months later.

The nickname of Boleslaw was also explained in other ways. According to a legend, Boleslaw slammed his face against a wall after watching his father's subservience towards the Germans and Czechs. According to Jan Długosz, the Prince in his youth suffered from an ulcer, which caused the deformity of his face. According to older historiography, he received the nickname Wrymouth for his perjury.

Early Years

Following Bolesław's birth the political climate in the country changed. The position of Bolesław as an heir to the throne was threatened by the presence of Mieszko Bolesławowic, who was already seventeen at the time and was furthermore, by agreement with Władysław I Herman himself, the first in line to succeed. In all likelihood it was this situation that precipitated the young prince Mieszko's demise in 1089. In that same year Wladyslaw I Herman's first-born son Zbigniew was sent to a monastery in Quedlinburg, Saxony. This suggests that Wladyslaw I Herman intended to be rid of Zbigniew by making him a monk, and therefore depriving him of any chance of succession. This eliminated two pretenders to the Polish throne, secured young Bolesław's inheritance as well as diminished the growing opposition to Wladyslaw I Herman among the nobility. Shortly after his ascension, however, Władysław I Herman was forced by the barons to give up the ''de facto'' reins of government to Count Palatine Sieciech. This turn of events was likely due to the fact that Herman owed the throne to the barons, the most powerful of whom was Sieciech.Ł. Piernikarczyk
''Palatyn Sieciech (1080–1100)'' (in Polish)
etrieved 13 July 2014

Around this time Władysław I Herman married again. The chosen bride was Judith-Maria, daughter of Emperor Henry III and widow of King Solomon of Hungary, who after her wedding took the name ''Sophia'' in order to distinguish herself from Władysław I Herman's first wife. Through this marriage Bolesław gained three or four half-sisters, and as a consequence he remained the only legitimate son and heir. It's believed that the new Duchess was actively aiding Sieciech in his schemes to take over the country and that she became his mistress.

Position of Sieciech in Poland

In 1090 Polish forces under Sieciech's command managed to gain control of Gdańsk Pomerania, albeit for a short time. Major towns were garrisoned by Polish troops, and the rest were burned in order to thwart future resistance. Several months later, however, a rebellion of native elites led to the restoration of the region's independence from Poland. The following year a punitive expedition was organized, in order to recover Gdańsk Pomerania. The campaign was decided at the battle of the Wda River, where the Polish knights suffered a defeat despite the assistance of Bohemian troops.

Prince Bolesław's childhood happened at a time when a massive emigration from Poland was taking place due to Sieciech's political repression. Most of the elites who became political refugees found safe haven in Bohemia. Another consequence of Sieciech's political persecution was the kidnapping of Zbigniew by Sieciech's enemies and his return from abroad in 1093. Zbigniew took refuge in Silesia, a stronghold of negative sentiment for both Sieciech and his nominal patron Władysław I Herman. In the absence of Sieciech and Bolesław, who were captured by Hungarians, Prince Władysław I then undertook a penal expedition to Silesia, which was unsuccessful and subsequently obliged him to recognize Zbigniew as a legitimate heir. In 1093 Władysław I signed an Act of Legitimization which granted Zbigniew the rights of descent from his line. Zbigniew was also granted the right to succeed to the throne. Following Sieciech and Bolesław's escape from Hungary, an expedition against Zbigniew was mounted by the Count Palatine. Its aim was to nullify the Act of Legitimization. The contestants met at the battle of Goplo in 1096, where Sieciech's forces annihilated the supporters of Zbigniew. Zbigniew himself was taken prisoner, but regained his freedom a year later, in May 1097, due to the intervention of the bishops. At the same time his rights, guaranteed by the Act of Legitimization, were reinstated.

Simultaneously a great migration of Jews from Western Europe to Poland began circa 1096, around the time of the First Crusade. The tolerant rule of Władysław I Herman attracted the Jews who were permitted to settle throughout the entire kingdom without restrictions. The Polish prince took great care of the Hebrew Diaspora, as he understood its positive influence on the growth of the country's economy. The new Jewish citizens soon gained the trust of the gentiles during the rule of Bolesław III.

Youth

Division of the country

In view of his father's disapproval, and after discovering the plans of Sieciech and Duchess Judith-Sophia to take over the country Zbigniew gained an ally in the young prince Bolesław. Both brothers demanded that the reins of government be handed over to them. It is difficult to believe, however, that Bolesław was making independent decisions at this point as he was only 12 years of age. It is postulated that at this stage he was merely a pawn in service of the Baron's power struggle. Władysław I Herman, however, agreed to divide the realm between the brothers, each to be granted his own province while the Prince – Władysław I himself – kept control of Mazovia and its capital at Płock. Władysław also retained control of the most important cities, ''i.e.'', Wrocław, Kraków and Sandomierz. Zbigniew's province encompassed Greater Poland including Gniezno, Kuyavia, Łęczyca Land and Sieradz Land. Bolesław's territory included Lesser Poland, Silesia and Lubusz Land.

The division of the country under Bolesław and Zbigniew's co-rule greatly alarmed Sieciech, who then began preparing to dispose of the brothers altogether. Sieciech understood that the division of the country would undermine his position.S. Szczur: ''Historia Polski – średniowiecze'', p. 120. He initiated a military settlement of the issue and he gained the Prince's support for it. The position of Władysław I is seen as ambiguous as he chose to support Sieciech's cause instead of his sons'.

Fight against Sieciech

In response to Sieciech's preparations Bolesław and Zbigniew entered into an alliance at a popular assembly or Wiec organized in Wrocław by a magnate named Skarbimir of the Awdaniec family. There it was decided to remove the current guardian of Bolesław, a noble named Wojslaw who was a relative of Sieciech, and arrange for an expedition against the Palatine. Subsequently, in 1099, the armies of Sieciech and Prince Herman encountered the forces of Zbigniew and Bolesław near Żarnowiec by the river Pilica. There the forces of Bolesław and Zbigniew defeated Sieciech's army, and Władysław I Herman was obliged to permanently remove Sieciech from the position of Count Palatine. In the same year, at Christmas, Bolesław concluded a short-lived peace with Bohemia in Žatec. According to Cosmas, Bolesław was appointed Miecznik (en: ''Sword-bearer'') of his uncle Bretislaus II, Duke of Bohemia. In addition, the young prince would be paid the amount of 100 pieces of fine silver and 10 talents of gold annually as a tribute to Bohemia (it was about the land of Silesia, for which he paid tribute to Władysław I).

The rebel forces then headed to Sieciechów, where the Palatine took refuge. Unexpectedly, Prince Władysław came to the aid of his besieged favorite with a small force. At this point, the Princes decided to depose their father. The opposition sent Zbigniew with an armed contingent to Masovia, where he was to take control of Płock, while Bolesław was directed to the South to encircle Władysław's forces. Władysław, however, predicted this maneuver and sent his forces back to Masovia. In the environs of Płock the battle was finally joined and the forces of Władysław I were defeated. The Prince was thereafter forced to send Sieciech into exile. The Palatine left Poland around 1100/1101 and spent time in German territory. He eventually returned to Poland but never played a political role again. He may have been blinded.

First years of government

Struggle for supremacy (1102–06)

Władysław I Herman died on 4 June 1102.P. Jasienica: ''Polska Piastów'', Warsaw 2007, p. 117. The country was divided into two provinces, each administered by one of the late prince's sons. The extent of each province closely resembled the provinces that the princes were granted by their father three years earlier, the only difference being that Zbigniew also controlled Mazovia with its capital at Płock, effectively ruling the northern part of the kingdom, while his younger half-brother Bolesław ruled its southern portion. In this way two virtually separate states were created. According to some historians, Zbigniew tried to play the role of ''princeps'' or overlord, because at that time Bolesław was only 16 years old. Because he was still too inexperienced to independently direct his domains, the local nobility had great influence over political affairs, including his teacher, Skarbimir, from the Awdaniec family.M. K. Barański: ''Dynastia Piastów w Polsce'', Warsaw 2008, p. 193.

They conducted separate policies internally as well as externally. They each sought alliances, and sometimes they were enemies of one another. Such was the case with Pomerania, towards which Bolesław aimed his ambitions. Zbigniew, whose country bordered Pomerania, wished to maintain good relations with his northern neighbor. Bolesław, eager to expand his dominion, organized several raids into Pomerania and Prussia. In Autumn of 1102 Bolesław organized a war party into Pomerania during which his forces sacked Białogard.

The Pomeranians sent retaliatory war parties into Polish territory, but as Pomerania bordered Zbigniew's territory these raids ravaged the lands of the prince who was not at fault. Therefore, in order to put pressure on Bolesław, Zbigniew allied himself with Bořivoj II of Bohemia, to whom he promised to pay tribute in return for his help. By aligning himself with Bolesław's southern neighbor Zbigniew wished to compel Bolesław to cease his raids into Pomerania. Bolesław, on the other hand, allied himself with Kievan Rus and Hungary. His marriage to Zbyslava, the daughter of Sviatopolk II Iziaslavich in 1103, was to seal the alliance between himself and the prince of Kiev. However, Bolesław's first diplomatic move was to recognize Pope Paschal II, which put him in strong opposition to the Holy Roman Empire. A later visit of papal legate Gwalo, Bishop of Beauvais, put church matters into order and increased Bolesław's influence.

Zbigniew declined to attend the marriage of Bolesław and Zbyslava. He saw this union and the alliance with Kiev as a serious threat. He bribedM. K. Barański: ''Dynastia Piastów w Polsce'', Warsaw, 2008, p. 195. his ally, Bořivoj II of Bohemia, to invade Bolesław's province, ostensibly to claim the Polish crown. Bolesław retaliated with expeditions into Pomerania in 1103 (including the battle of Kołobrzeg, where he was defeated) Moravia in 1104–05, which brought the young prince not only loot, but also effectively ended the Pomeranian alliance.M. Spórna, P. Wierzbicki: ''Słownik władców Polski i pretendentów do tronu polskiego'', p. 62. During the return of the army, one part, commanded by Żelisław, was defeated by the Bohemians. Bolesław, who commanded the other part, couldn't defeat them. Skarbimir bribed Bořivoj II, who returned to his homeland and concluded a short-lived peace with Bolesław. Then Bořivoj II ended his alliance with Zbigniew.

The intervention of Bolesław in a dynastic dispute in Hungary put him in a difficult political situation. At first, he supported the pretender Álmos, and marched to Hungary to help him. However, during the siege of Abaújvár in 1104, Álmos changed his mind and made peace overtures to his brother and rival King Coloman, at that point Zbigniew's ally. Bolesław then retired his troops from Hungary and in 1105 made a treaty with Coloman. In addition, the Hungarian King broke his agreements with Bohemia. The dynastic dispute in Prague between Bořivoj II and his cousin Svatopluk prompted Bolesław and his new ally King Coloman to intervene in support of Svatopluk. However, a new rebellion by Álmos forced Coloman and his army to return to Hungary. Bolesław also decided to retreat. Svatopluk tried to capture the city alone, but suffered a complete defeat and so his attempt to seize power in Bohemia was unsuccessful.

Also in 1105, Bolesław entered into an agreement with his half-brother, similar to that entered just a few years before with their stepmother Judith-Sophia, which, in exchange for abundant dower lands, secured her neutrality in Bolesław's political contest with Zbigniew. The treaty, signed in Tyniec, dealt with foreign policy, albeit with no agreement about Pomerania. One year later, the treaty ended when Zbigniew refused to help his half-brother in his fight against Pomerania. While hunting, Bolesław was unexpectedly attacked by them. In the battle, the young prince almost lost his life. Bohemia, using the involvement of Bolesław in Pomeranian affairs as an excuse, attacked Silesia. The prince tried to re-establish the alliance with his half-brother, but without success, and so reached a rapprochement with Bohemia in 1106. Bolesław managed to bribe Bořivoj II to join his side in the contest against Zbigniew and shortly after formally allied himself with Coloman of Hungary. With the help of his Kievan and Hungarian allies Bolesław attacked Zbigniew's territory, beginning a civil war. The allied forces of Bolesław easily took control of most important cities, including Kalisz, Gniezno, Spycimierz and Łęczyca,R. Grodecki, S. Zachorowski, J. Dąbrowski: ''Dzieje Polski średniowiecznej'', vol. I, p. 137. in effect taking half of Zbigniew's lands. Through the mediation of Baldwin, Bishop of Kraków, a peace treaty was signed at Łęczyca,S. Szczur: ''Historia Polski – średniowiecze'', p. 122. in which Zbigniew officially recognized Bolesław as the Supreme Prince of all Poland. However, he was allowed to retain Masovia as a fief.

Sole Ruler of Poland

First Expedition to Bohemia and exile of Zbigniew

In 1107 Bolesław III along with his ally King Coloman of Hungary invaded Bohemia in order to aid Svatopluk in gaining the Czech throne and to secure Polish interests to the south. The expedition was a complete success: on 14 May 1107 Svatopluk was made Duke of Bohemia in Prague.

In the winter of 1107–08, with the help of Kievan and Hungarian allies, Bolesław undertook a punitive expedition against his brother Zbigniew. One reason for this was that Zbigniew had not followed his orders and had refused to burn down one of the fortresses of Kurów near Puławy. Another reason was that Zbigniew had not performed his duties as a vassal by failing to provide military aid to Bolesław for a campaign against the Pomeranians. Bolesław's forces attacked Mazovia and quickly forced Zbigniew to surrender. Following this, Zbigniew was banished from the country and, with his followers, took refuge in Prague, where he gained the support of Svatopluk.M. K. Barański: ''Dynastia Piastów w Polsce'', p. 201. From then Bolesław was the sole lord of the Polish lands, though in fact his over-lordship began in 1107 when Zbigniew paid him homage as his feudal lord.

In 1108 the balance of power in Europe changed. Svatopluk decided to pay homage to Emperor Henry V and in exchange received from him the formal investiture of Bohemia. At the same time King Coloman of Hungary was under attack from the combined forces of the Holy Roman Empire and Bohemia. Svatopluk, joined by Zbigniew and his followers, also attacked Poland. Bolesław avoided a direct confrontation because he was busy fighting Pomerania. The Polish-Hungarian coalition gave aid and shelter to Bořivoj II. Later that year, Bolesław and Coloman sent a new expedition to Bohemia, prompted by the invasion of Hungary by the German-Bohemian coalition (during which Pozsony Castle was put under siege)M. K. Barański: ''Dynastia Piastów w Polsce'', p. 202. and the fact that Svatopluk, who owed Bolesław his throne, didn't honor his promise to return Silesian cities seized from Poland (Racibórz, Kamieniec, Koźle among others) by his predecessors.R. Grodecki, S. Zachorowski, J. Dąbrowski: ''Dzieje Polski średniowiecznej'', vol. I , p. 141. Bolesław then decided to restore Bořivoj II to the Bohemian throne, but was unable to do so owing to the need to divert his forces north to thwart a Pomeranian invasion.

Polish-German War of 1109

In response to Bolesław's aggressive foreign policy, the Holy Roman Emperor, Henry V, undertook a punitive expedition against Poland in 1109, assisted by Czech warriors provided by Svatopluk of Bohemia. The alleged ''casus belli'' was to restore Zbigniew to his former position. The Emperor gave Bolesław an ultimatum: he would abandon the expedition only if Bolesław gave Zbigniew half of Poland to rule, formally recognized Henry as overlord and paid 300 pieces of fine silver as a regular tribute.K. Kmąk
''Wojna polsko-niemiecka 1109 (in Polish)''
etrieved 15 July 2014 Bolesław rejected Henry's demands. During the negotiations between the Empire and Poland, the Polish ruler was in the middle of a war against Pomerania. On the west side of the Oder river, Henry V hurriedly gathered knights for his expedition against Poland. Before the fight ended in Pomerania, the German troops were able to approach Głogów.

The military operations mainly took place in Silesia in southwestern Poland, where Henry V's army laid siege to the major cities of Głogów, Wrocław and Bytom Odrzański. In addition to defending the towns, Bolesław conducted a guerrilla war against the Holy Roman Emperor and his allies. He reportedly defeated the expedition at the Battle of Hundsfeld on 24 August 1109, although the existence of this battle is doubted by historians because it was first recorded about a century later.

Second Expedition to Bohemia

In 1110 Bolesław undertook an unsuccessful military expedition against Bohemia. His intention was to install yet another pretender on the Czech throne, Soběslav I, who sought refuge in Poland. During the campaign he won a decisive victory against the Czechs at the Battle of Trutina on 8 October 1110; however, following this battle he ordered his forces to withdraw. The reason for this is speculated to be the unpopularity of Soběslav I among Czechs as well as Bolesław's unwillingness to further harm his relations with the Holy Roman Empire. In 1111 a truce between Poland and the Empire was signed, stipulating that Soběslav I would be able to return to Bohemia while Zbigniew would be able to return Poland. Bolesław's assent was likely under pressure from the many supporters of the exiled prince in 1108, who, according to the reports of Gallus Anonymus, was surrounded by bad advisers (probably including Martin I, Archbishop of Gniezno). Once in Poland, his advisers persuaded Zbigniew to claim sovereignty over his previous domains. The first step was his presence at the Advent ceremonial, surrounded by attendants, with a sword carried before him, an exclusive prerogative of the ruler. As he had recognized Bolesław as his overlord in Łęczyca in 1107, Boleslaw considered this an act of treason, causing a definitive breach in their relationship. Probably for these reasons, Zbigniew was blinded on Bolesław's orders in 1112.

Excommunication

The blinding of Zbigniew caused a strong negative reaction among Bolesław's subjects. Unlike in the east, blinding in medieval Poland was accomplished not by burning the eyes out with a red hot iron rod or knife, but employed a much more brutal technique in which the condemned's eyes were pried out using special pliers. The condemned was then made to open his eyes and if he did not do so, his eyelids were also removed.

Contemporary sources don't provide clear information on whether Bolesław was excluded from the community of the Church. It is generally believed that Archbishop Martin I of Gniezno (who was a strong supporter of Zbigniew) excommunicated Bolesław for blinding his half-brother. The excommunication exempted all Bolesław's subjects from their oaths of obedience. The prince was faced with a real possibility of an uprising of the sort that deposed Bolesław the Bold. Recognizing his precarious situation, Bolesław sought the customary penance that would reconcile him with the high priesthood. According to Gallus Anonymus, Bolesław first fasted for forty days and made gifts to the poor:

:: (...)''He slept in ashes and sackcloth, among the streams of tears and sobs, as he renounced communion and conversation with people.''

It's possible that Bolesław decided to do this to rebuild his weakened authority and gain the favor of Zbigniew's supporters. Blinding his half-brother might have been perceived by Polish society as a breach of the principle of solidarity among the members of the ruling dynasty, a key foundation of public order.

According to Gallus, Bolesław also sought and received forgiveness from his half-brother. In the next part of his penance, the prince made a pilgrimage to Hungary to the Abbeys of Saint Giles in Somogyvár and Saint Stephen I in Székesfehérvár. The pilgrimage to the Abbey of Saint Giles also had a political goal; Bolesław strengthened his ties of friendship and alliance with the Arpad dynasty. Following his return to Poland, Bolesław even traveled to Gniezno to pay further penance at the tomb of Saint Adalbert of Prague, where poor people and clergy received numerous costly gifts from the prince.Gallus Anonymus: ''Cronicae et gesta ducum sive principum Polonorum'', p. 161. Only after this was the excommunication finally lifted. Following his repentance the Polish prince made a vague commitment to the Church.

No information survives about Zbigniew's death. In the obituary of the Benedictine monastery in Lubiń dated 8 July 1113 was reported the death of a monk in Tyniec called ''brother Zbigniew''. Historians believed that he could be Bolesław's half-brother. The information marked that his burial place was in the Benedictine monastery of Tyniec.

Conquest and conversion of Pomerania

The loss of Pomerania during the reign of Casimir I the Restorer weakened the Polish state, and, during the second half of the 11th century, subsequent rulers weren't able to recover all the lands that once belonged to Mieszko I and Bolesław I the Brave. Only after defeating Zbigniew and successfully opposing Bohemian claims against Silesia in 1109 was Bolesław III able to expand to the West.

Strengthening the Polish-Pomeranian borders

The conquest of Pomerania had been a lifelong pursuit for Bolesław. His political goals were twofold: strengthen the Polish border on the Noteć river line, and subjugate Pomerania. He intended to exercise Polish political overlordship but not actually incorporate Pomerania with the exception of Gdańsk Pomerania and a southern belt north of the River Noteć, Wieleń, Nakło, Czarnków, Ujście and Wyszogród. Some sources report that the border began at the mouth of the rivers Warta and Oder in the west, running along the Noteć.

Before Bolesław III began to expand in Gdańsk Pomerania (Pomerelia), he normalized his political relations with Bohemia in 1114 at a great convention on the border of the Nysa Kłodzka river. He was assisted by Bohemian princes of the Premyslid line: namely, Vladislaus I, Otto II the Black and Soběslav I. The pact was sealed by the marriage of Bolesław (a widower since his wife Zbyslava's death) with Vladislaus I and Otto II's sister-in-law, the German noblewoman Salomea of Berg.

The conquest of Gdańsk Pomerania

After normalising his relations with Bohemia, Bolesław conducted a successful expedition against Prussia in 1115. This secured Poland's north-east border, which allowed him to invade Gdańsk Pomerania. The conquest of this part of the Pomeranian lands from 1115–19 achieved a long-time aim of previous Polish rulers: the complete incorporation of the territories on the Vistula River, including the castellany of Nakło, into Poland. The northern borders of the Polish duchy were probably established on the line of the rivers Gwda and Uniesta (in later times these rivers were the boundary between Pomerania and the Oder Slavic). It is also possible that the border ran along the Łeba.

The local rulers of the conquered Gdańsk and Słupsk were replaced by Polish nobles. Bolesław also introduced Polish clerical organization, in order to protect his interests in that territory. However, these areas refused to follow the church organization. The incorporation into the Polish Church occurred only during 1125–26 at the time of the visit of the papal legate, Gilles, Cardinal-Bishop of Tusculum.

Rebellion of Skarbimir

During Bolesław's Pomeranian campaign a rebellion led by Count Palatine Skarbimir from the Awdaniec family began. The rebellion was quelled by the prince in 1117 and the mutinous nobleman was blinded as punishment. The conflict between Bolesław and the Awdaniec family is difficult to explain due to the lack of sources. The cause was probably the growing influence of the family, Skarbimir's ambition, and his jealousy of Bolesław and his increased popularity.B. Snoch: ''Protoplasta książąt śląskich'', p. 17. Other probable factors were the desire to establish Władysław II, Bolesław's first-born son, as the sole ruler after his death, or Boleslaw's fears of losing his position, as had happened in the conflict with Sieciech. It was also suggested that Skarbimir contacted the Pomeranians and Vladimir II Monomakh, Grand Prince of Kievan Rus'. Medieval historiography also associated the rebellion with the Law of Succession issued by Boleslaw. The underlying inheritance controversy arose between 1115 and 1116, after the birth of his second son Leszek, first of his second marriage. According to one hypothesis, Skarbimir objected to the adoption of the statute, which changed the traditional Polish succession customs. In the suppression of the rebellion a major role was played by Piotr Włostowic of the Labedz family, who replaced Skarbimir as Count Palatine. On his defeat, Skarbimir received a minor punishment from Bolesław. The rebellion of Skarbimir also underlined the importance of the conquest of Gdańsk Pomerania.K. Maleczyński: ''Bolesław III Krzywousty'', pp. 212–214; A. Jóźwik
''Grodzisko w Czermnie'' (in Polish)
etrieved 17 July 2014

Intervention of Kievan Rus'

The Rurikid ruler Vladimir II Monomakh and his sons are believed to have intervened in Skarbimir's rebellion. In 1118 Monomakh incorporated Volhynia into his domains and expelled the ruler, Yaroslav Sviatopolkovich, who sought refuge first in Hungary,''Полное собранiе русскихъ лѣтописей'', vol. 2: ''Ипатiевская лѣтопись'', p. 8. then in Poland. In Yaroslav's place, Monomakh made his son Roman ruler of Volhynia, and after Roman's early death in 1119, replaced him with another son, Andrew, who invaded Polish territory in 1120 with the support of the Kipchaks tribe. A year later, Bolesław, with his brother-in-law, the exiled Yaroslav, organized a retaliatory expedition to Czermno.''Полное собранiе русскихъ лѣтописей'', vol. 7: ''Лѣтопись по Воскресенскому списку'', p. 25. For several years thereafter Bolesław intervened in the dynastic disputes of the House of Rurik.

During the 1120s the Kievan princes continued their expeditions against Poland. The neutrality of the neighbouring Principality of Peremyshl was attributed to Count Palatine Piotr Włostowic, who in 1122 captured Prince Volodar.S. Szczur: ''Historia Polski – średniowiecze'', p. 125. Jan Długosz placed this event in 1122 and again in 1134, where his reports about the kidnapping story appears Volodar captured by Piotr Włostowic. The chronicler mistaken the name of the kidnapped Volodar with Yaropolk. Jan Długosz
''Jana Długosza kanonika krakowskiego Dziejów polskich ksiąg dwanaście'', vol. I, p. 499, 521–523. (in Polish)
etrieved 17 July 2014 A year later Bolesław intervened again in Volhynia, where he wished to restore Yaroslav. The expedition (aided by Bohemian, Hungarian, Peremyshl and Terebovl forces) failed due to the death of Yaroslav and the stubborn resistance of the besieged Volodymyr-Volynskyi, aided by Skarbimir's supporters. This failed military expedition led to disturbances in the Polish-Hungarian-Halych alliance.

Conquest of Western Pomerania

In 1121 (or 1119) Pomeranian Dukes Wartislaw I and Swietopelk I were defeated by Bolesław's army at the battle of Niekładź near Gryfice. Polish troops ravaged Pomerania, destroyed native cities, and forced thousands of Pomeranians to resettle deep into Polish territory. Bolesław's further expansion was directed to Szczecin (1121–22). He knew that this city was well defended by both the natural barrier of the Oder river and his well-built fortifications, like Kołobrzeg. The only way to approach the walls was through the frozen waters of a nearby swamp. Taking advantage of the element of surprise, Bolesław launched his assault from precisely that direction, and took control of the city. Much of the population was slaughtered and the survivors were forced to pay homage to the Polish ruler.O. Baranowska: ''Pomorze Zachodnie – moja mała ojczyzna'', pp. 40–42.

Bolesław probably fought battles on the western side of the Oder, as well as near Lake Morzyce (now the German ''Müritz''), which were technically outside of Pomerania. At the same time, Lothair, Duke of Saxony (and future Holy Roman Emperor), also moved against this area. According to contemporary sources, a Saxon army approached from above the Elbe River in the direction of modern-day Rostock. They conquered the Warinis, Circipanes, Kessinians and part of the Tollensers tribes. This two-pronged expansion was probably the result of earlier unknown agreements between the rulers. This was the first step for the later Christianization of Pomeranian lands.

In 1122 Bolesław finally conquered Western Pomerania, which became a Polish fief. Duke Wartislaw I was forced to pay homage, as well as an annual tribute of 500 marks of fine silver to the Polish ruler, and was further obliged to give military aid at Bolesław's request.L. Fabiańczyk: ''Apostoł Pomorza'', p. 39. In subsequent years the tribute was reduced to 300 marks.J.W. Szymański: ''Książęcy ród Gryfitów'', p. 381. This success enabled Bolesław to make further conquests. In 1123 his troops even reached Rügen, but failed to conquer it.

According to modern historiography, Bolesław began to pay tribute to Emperor Henry V, at least from 1135, believed to have been 500 marks of fine silver annually. It is unknown why Bolesław did this, as the sources do not contain any reference to the Polish ruler being tributary to the Holy Roman Empire in the period 1121–35.

Christianization of Western Pomerania

In order to strengthen ties with Pomerania, Bolesław organized a mission to Christianize the newly acquired territory. At the same time he wished to subordinate Pomerania to the Gniezno Archbishopric. Unfortunately first attempts made by unknown missionaries did not make the desired progress. Another attempt, officially sponsored by Bolesław and led by Bernard the Spaniard, who traveled to Wolin during 1122–23, ended in another failure. The next two missions were carried out in 1124–25 and 1128 by Bishop Otto of Bamberg (called the Apostle of Pomerania). After appropriate consultation with Bolesław, Bishop Otto set out on the first stage of Christianization of the region in 1124. During the mission Otto stayed first at Bolesław's court, where he was provided with appropriate equipment, fire and several clergymen for his trip to Pomerania.

The Bishop was accompanied throughout his mission by the Pomeranian ruler Wartislaw I, who greeted him on the border of his domains, in the environs of the city of Sanok. In Stargard the pagan prince promised Otto his assistance in the Pomeranian cities as well as help during the journey. He also assigned 500 armored knights to act as guards for the bishop's protection, and obtain the baptism of the elders tribal leaders.J. Kłoczowski: ''Młodsza Europa. Europa Środkowo-Wschodnia w kręgu cywilizacji chrześcijańskiej średniowiecza'', p. 35. Primary missionary activities were directed to Pyrzyce, then the towns of Kamień, Wolin, Szczecin and once again Wolin. In the first two towns the Christianization went without resistance. In Kamień the task was facilitated by the intercession of Wartislaw I's own wife and dignitaries. At Szczecin and Wolin, which were important centers of Slavic paganism, opposition to conversion was particularly strong among the pagan priests and local population. The conversion was finally accepted only after Bolesław lowered the annual tribute imposed on the Pomeranians. Four great pagan temples were torn down and churches were built in their places. Otto's mission of 1124 ended with the erection of bishoprics in Lubusz for Western Pomerania and in Kruszwica for Eastern Pomerania (Gdańsk), which was subordinated to the Archbishopric of Gniezno.

In 1127 the first pagan rebellions began to take place. These were due to both the large tribute imposed by Poland as well as a plague that descended on Pomerania, which was blamed on Christianity. The rebellions were largely instigated by the old pagan priests, who had not come to terms with their new circumstances. Wartislaw I confronted these uprisings with some success, but was unable to prevent several insurgent raids into Polish territory. Because of this Bolesław prepared a massive punitive expedition that may have spoiled all the earlier accomplishments of the missionary work by Bishop Otto. Thanks to Otto's diplomacy, direct confrontation was avoided and in 1128 he embarked on another mission to Pomerania. Wartislaw I greeted Otto at Demmin with some Polish knights. This time more pressure was applied to the territories west of the Oder River, i.e. Usedom, Wolgast and Gützkow, which weren't under Polish suzerainty. The final stage of the mission returned to Szczecin, Wolin and Kamień. The Christianization of Pomerania is considered one of the greatest accomplishments of Bolesław's Pomeranian policy.

In 1129 Bolesław concluded with Niels, King of Denmark an alliance directed against Wartislaw I and the attempts of Lothair III, King of Germany to subordinate Western Pomerania. In retaliation for the sack of Płock by Wartislaw I in 1128, Polish-Danish troops took the Western Pomeranian islands of Wolin and Usedom.

At end of the 1120s Bolesław began to implement an ecclesiastical organization of Pomerania. Gdańsk Pomerania was added to the Diocese of Włocławek, known at the time as the Kujavian Diocese. A strip of borderland north of Noteć was split between the Diocese of Gniezno and Diocese of Poznan. The bulk of Pomerania was, however, made an independent Pomeranian bishopric (whose first bishop, Adalbert, was one of the participants in the missionary expedition and former Polish royal chaplain), set up in the territory of the Duchy of Pomerania in 1140, and, after Bolesław died in 1138, the duchy became independent of Poland.

The project of Archbishop Norbert of Magdeburg

During the 1130s, Norbert, Archbishop of Magdeburg undertook a project under which Pomerania would be divided between two dioceses subordinated to his archbishopric. At the same time, he revived the old claims of Magdeburg's ecclesiastical sovereignty over all Poland. A first Bull was prepared by 1131, but never entered into force. Despite this setback, Norbert continued to attempt to subdue the Polish Church during 1132–33. A call was made in the Curia on behalf of the Polish bishops.

The Polish bishops didn't appear before Pope Innocent II, which resulted in the issuing of the Bull ''Sacrosancta Romana'' in 1133, which confirmed the sovereignty of the Archbishopric of Magdeburg over the Polish Church and the projected Pomeranian dioceses. The formal ''privilegium maius'' was the culmination of Norbert's efforts. Bolesław, trying to save his past efforts in Pomeranian politics, submitted at Merseburg in 1135.

Conquest of Rügen and alliance with Wartislaw I

To consolidate his power over Pomerania Bolesław conducted an expedition to the island of Rügen in 1130. For this purpose, he concluded an alliance with the Danish duke Magnus Nilsson (his son-in-law) who provided him with a fleet in exchange for support in his efforts to obtain the Swedish throne. The fleet transported Polish troops to Rügen, but the intended battle on the island never happened, because, at the sight of the Polish-Danish combined forces, the defending Rani recognized Bolesław's overlordship.

After the successful invasion of the Danish capital, Roskilde, in 1134, Bolesław formed an alliance with Wartislaw I of Pomerania against King Eric II of Denmark, an ally of Emperor Lothair III. The role of the Polish prince was limited to aiding the House of Griffins, not due while the real interest in Danish affairs. The Danish, after repelling the first attack, led a successful retaliatory expedition and expansion into Pomerania.

Congress of Merseburg

Political Background

In 1125 Henry V, Holy Roman Emperor and King of Germany, died. His successor, Lothair of Supplinburg, has been embroiled in disputes over his inheritance. For the Imperial crown, he became involved in the affairs of the Papacy. In 1130 there was a double election to the Apostolic See. Lothair supported Pope Innocent II, hoping in this way to secure his own coronation.W. Czapliński, A. Galos, W. Korta: ''Historia Niemiec'', p. 138. Contrary to was expected, Lothair's Imperial coronation didn't end his disputes against the contenders for the German throne.

In 1130 Bolesław controlled the areas situated on the left bank of the Oder river on the island of Rügen. Germany also wanted to control these lands, but the internal political situation and the involvement in the civil war in Hungary, however, didn't allow an armed conflict. The Bull ''Sacrosancta Romana'' of 1133 give the Archbishopric of Magdeburg sovereign rights over the Pomeranian dioceses instituted by Bolesław.

The death of King Stephen II of Hungary in 1131 led the country into civil war between two claimants to the throne: Béla the Blind (son of Álmos, Duke of Croatia) and Boris (the alleged son of King Coloman). Boris sought the help of the Polish ruler, who hoped for a closer alliance with Hungary and cooperation with the Kievan Rus' princes (Boris was a son of a daughter of Vladimir II Monomakh). However, Bolesław overestimated his strength against Béla, who counted with the support of almost all his country. The Polish army faced the combined forces of Hungary, Bohemia, Austria and Germany in the Battle of the Sajó river (22 July 1132), where the coalition had a complete victory over the Polish prince, who was forced to retreat.

The success in Hungary was used by the Bohemian ruler Soběslav I, an Imperial vassal, who during 1132–34 repeatedly led invasions to Silesia. The issue over the property of Silesia was subjected to the decision of Lothair III.

Preparations for the Congress

In February 1134 Soběslav I of Bohemia and dignitaries of King Béla II of Hungary, together with Bishop Peter of Székesfehérvár went to Altenburg, where they presented their allegations against the Polish ruler. They asked the intervention of the Holy Roman Empire (preliminary requests occurred two years earlier). Lothair III accepted the request, acting as an arbitrator in the dynastic disputes in Central Europe.

At the same time Béla II and Prince Volodymyrko of Peremyshl undertook a military expedition against Poland. The combined forces occupied Lesser Poland, reaching to Wiślica. Shortly after, Bolesław received a summons to the Imperial court at Magdeburg on 26 June 1135. Playing for time, however, he only send deputies. The emperor sent another delegation and requested a personal appearance of the Polish ruler, setting a new date on 15 August 1135, this time in Merseburg. Bolesław realized that without an agreement with Lothair III he couldn't maintain the control over the newly conquered lands on the west side of the Oder and the island of Rügen.

Even before the Congress of Merseburg was performed, Bolesław persuaded one of ruling princes of Western Pomerania, Ratibor I to make an expedition against Denmark. It was a clear expression of ostentation to Emperor Lothair III because the King of Denmark was a German vassal. The fleet formed by 650 boats (with 44 knights and 2 horses) attacked the rich Norwegian port city of Kungahälla (now Kungälv in Sweden).L. Fabiańczyk: ''Apostoł Pomorza'', p. 70.

Provisions of the Congress

The Congress took place on 15 August 1135. During the ceremony, Emperor Lothair II recognized the rights of the Polish ruler over Pomerania. In return, Bolesław agreed to pay homage for the Pomeranian lands and the Principality of Rügen, with the payment of 6,000 pieces of fine silver from these lands to the Holy Roman Empire; however, he remained fully independent ruler of his main realm, Poland. With Bolesław's death in 1138, Polish authority over Pomerania ended, triggering competition of the Holy Roman Empire and Denmark for the area. The conflict with Hungary also ended, with Bolesław recognizing Béla II's rule. The agreement was sealed with the betrothal of Bolesław's daughter Judith with Béla II's Géza (this marriage never took place). In case of the Bohemian-Polish dispute the Imperial mediation failed. Bolesław argued he must be treated as a sovereign ruler, who wasn't the case of Soběslav I, an imperial vassal. Lothair III, unable to come to an agreement with the Polish ruler, proposed to discuss the matter in subsequent negotiations.

The Congress ended with church ceremonies, during which Bolesław carried the imperial sword. This was an honor granted only to sovereign rulers. An indirect goal of Polish diplomacy was the successful invalidation of the Papal Bull of 1133 and the recognition of metropolitan rights of the Archbishopric of Gniezno