Duchy (Kingdom of Hungary) in the context of "Béla I of Hungary"

Ladislaus I (Hungarian: I. László, Croatian: Ladislav I., Slovak: Ladislav I., Polish: Władysław I; c. 1040 – 29 July 1095), also known as Saint Ladislas, was King of Hungary from 1077 and King of Croatia from 1091. He was the second son of King Béla I of Hungary and Richeza (or Adelaide) of Poland. After Béla's death in 1063, Ladislaus and his elder brother, Géza, acknowledged their cousin Solomon as the lawful king in exchange for receiving their father's former duchy, which included one-third of the kingdom. They cooperated with Solomon for the next decade. Ladislaus's most popular legend, which narrates his fight with a "Cuman" (a Turkic nomad marauder) who abducted a Hungarian girl, is connected to this period. The brothers' relationship with Solomon deteriorated in the early 1070s, and they rebelled against him. Géza was proclaimed king in 1074, but Solomon maintained control of the western regions of his kingdom. During Géza's reign, Ladislaus was his brother's most influential adviser.

Géza died in 1077, and his supporters made Ladislaus king. Solomon resisted Ladislaus with assistance from King Henry IV of Germany. Ladislaus supported Henry IV's opponents during the Investiture Controversy. In 1081, Solomon abdicated and acknowledged Ladislaus's reign, but he conspired to regain the royal crown, and Ladislaus imprisoned him. Ladislaus canonized the first Hungarian saints (including his distant relatives, King Stephen I and Duke Emeric) in 1085. He set Solomon free during the canonization ceremony.

Coloman the Learned, also the Book-Lover or the Bookish (Hungarian: Könyves Kálmán; Croatian: Koloman; Slovak: Koloman Učený; c. 1070 – 3 February 1116), was King of Hungary from 1095 and King of Croatia from 1097 until his death. Because Coloman and his younger brother Álmos were underage when their father Géza I died, their uncle Ladislaus I ascended the throne in 1077. Ladislaus prepared Coloman—who was "half-blind and humpbacked", according to late medieval Hungarian chronicles—for a church career, and Coloman was eventually appointed bishop of Eger or Várad (Oradea, Romania) in the early 1090s. The dying King Ladislaus preferred Álmos to Coloman when nominating his heir in early 1095. Coloman fled from Hungary but returned around 19 July 1095 when his uncle died. He was crowned in early 1096; the circumstances of his accession to the throne are unknown. He granted the Hungarian Duchy—one-third of the Kingdom of Hungary—to Álmos.

In the year of Coloman's coronation, at least five large groups of crusaders arrived in Hungary on their way to the Holy Land. He annihilated the bands who were entering his kingdom unauthorized or pillaging the countryside, but the main crusader army crossed Hungary without incident. He invaded Croatia in 1097, defeating its last native king Petar Snačić. Consequently, he was crowned king of Croatia in 1102. According to the late 14th-century Pacta conventa (the authenticity of which is not universally accepted by scholars), he was only crowned after having ratified a treaty with the leaders of the Croatian nobility. For centuries thereafter, the Hungarian monarchs were also the kings of Croatia.

Stephen IV (Hungarian: IV. István, Croatian: Stjepan IV, Slovak: Štefan IV; c. 1133 – 11 April 1165) was King of Hungary and Croatia, ascending to the throne between 1163 and 1165, when he usurped the crown of his nephew, Stephen III. He was the third son of Béla II of Hungary, and when his conspiracy against his brother Géza II failed, he was exiled from Hungary in the summer of 1157. He first sought refuge in the Holy Roman Empire, but received no support from Emperor Frederick I. Shortly afterwards he moved to the Byzantine Empire, where he married a niece of Emperor Manuel I Komnenos, Maria Komnene, and converted to the Eastern Orthodox Church.

After Géza II died on 31 May 1162, Emperor Manuel attempted to assist Stephen against his nephew and namesake, Stephen III, in seizing the crown. Although the Hungarian lords were willing to leave their young monarch, they sharply opposed Stephen and elected his brother, Ladislaus II, king. Ladislaus II granted the ducatus, or duchy, which included one-third of the kingdom, to Stephen. Ladislaus II died on 14 January 1163, and Stephen succeeded him. Lucas, Archbishop of Esztergom, who remained a staunch supporter of the expelled young Stephen III, denied to crown him and excommunicated him. Stephen IV remained unpopular among the Hungarian lords, enabling his nephew to muster an army. In the decisive battle, which was fought at Székesfehérvár on 19 June 1163, the younger Stephen routed his uncle, forcing him once again to flee Hungary.

Géza I (Hungarian pronunciation: [ˈɡeːzɒ]; Hungarian: I. Géza; c. 1040 – 25 April 1077) was King of Hungary from 1074 until his death. He was the eldest son of King Béla I. His baptismal name was Magnus. With German assistance, Géza's cousin Solomon acquired the crown when his father died in 1063, forcing Géza to leave Hungary. Géza returned with Polish reinforcements and signed a treaty with Solomon in early 1064. In the treaty, Géza and his brother Ladislaus acknowledged the rule of Solomon, who granted them their father's former duchy, which encompassed one-third of the Kingdom of Hungary.

Géza closely cooperated with Solomon, but their relationship became tense from 1071. The king invaded the duchy in February 1074 and defeated Géza in a battle. However, Géza was victorious at the decisive battle of Mogyoród on 14 March 1074. He soon acquired the throne, although Solomon maintained his rule in the regions of Moson and Pressburg (present-day Bratislava, Slovakia) for years. Géza initiated peace negotiations with his dethroned cousin in the last months of his life. Géza's sons were children when he died and he was succeeded by his brother Ladislaus.

Solomon, also Salomon (Hungarian: Salamon; 1053–1087) was King of Hungary from 1063. Being the elder son of Andrew I, he was crowned king in his father's lifetime in 1057 or 1058. However, he was forced to flee from Hungary after his uncle, Béla I, dethroned Andrew in 1060. Assisted by German troops, Solomon returned and was again crowned king in 1063. On this occasion he married Judith, sister of Henry IV, Holy Roman Emperor. In the following year he reached an agreement with his cousins, the three sons of Béla I. Géza, Ladislaus and Lampert acknowledged Solomon's rule, but in exchange received one-third of the kingdom as a separate duchy.

In the following years, Solomon and his cousins jointly fought against the Czechs, the Cumans and other enemies of the kingdom. Their relationship deteriorated in the early 1070s and Géza rebelled against him. Solomon could only maintain his rule in a small zone along the western frontiers of Hungary after his defeat in the Battle of Mogyoród on 14 March 1074. He officially abdicated in 1081, but was arrested for conspiring against Géza's brother and successor, Ladislaus.