Béla IV (1206 – 3 May 1270) was King of Hungary and Croatia between 1235 and 1270, and Duke of Styria from 1254 to 1258. As the oldest son of King Andrew II, he was crowned upon the initiative of a group of influential noblemen in his father's lifetime in 1214. His father, who strongly opposed Béla's coronation, refused to give him a province to rule until 1220. In this year, Béla was appointed Duke of Slavonia, also with jurisdiction in Croatia and Dalmatia. Around the same time, Béla married Maria, a daughter of Theodore I Laskaris, Emperor of Nicaea. From 1226, he governed Transylvania as duke. He supported Christian missions among the pagan Cumans who dwelled in the plains to the east of his province. Some Cuman chieftains acknowledged his suzerainty and he adopted the title of King of Cumania in 1233. King Andrew died on 21 September 1235 and Béla succeeded him. He attempted to restore royal authority, which had diminished under his father. For this purpose, he revised his predecessors' land grants and reclaimed former royal estates, causing discontent among the noblemen and the prelates.

The Mongols invaded Hungary and annihilated Béla's army in the Battle of Mohi on 11 April 1241. He escaped from the battlefield, but a Mongol detachment chased him from town to town as far as Trogir on the coast of the Adriatic Sea. Although he survived the invasion, the Mongols devastated the country before their unexpected withdrawal in March 1242. Béla introduced radical reforms in order to prepare his kingdom for a second Mongol invasion. He allowed the barons and the prelates to erect stone fortresses and to set up their private armed forces. He promoted the development of fortified towns. During his reign, thousands of colonists arrived from the Holy Roman Empire, Poland and other neighboring regions to settle in the depopulated lands. Béla's efforts to rebuild his devastated country won him the epithet of "second founder of the state" (Hungarian: második honalapító).

He set up a defensive alliance against the Mongols, which included Daniil Romanovich, Prince of Halych, Boleslaw the Chaste, Duke of Cracow and other Ruthenian and Polish princes. His allies supported him in occupying the Duchy of Styria in 1254, but it was lost to King Ottokar II of Bohemia six years later. During Béla's reign, a wide buffer zone—which included Bosnia, Barancs (Braničevo, Serbia) and other newly conquered regions—was established along the southern frontier of Hungary in the 1250s.

Béla's relationship with his oldest son and heir, Stephen, became tense in the early 1260s, because the elderly king favored his daughter Anna and his youngest child, Béla, Duke of Slavonia. He was forced to cede the territories of the Kingdom of Hungary east of the river Danube to Stephen, which caused a civil war lasting until 1266. Nevertheless, Béla's family was famed for his piety: he died as a Franciscan tertiary, and the veneration of his three saintly daughters—Kunigunda, Yolanda, and Margaret—was confirmed by the Holy See.

Béla was the oldest son of King Andrew II of Hungary by his first wife, Gertrude of Merania. He was born in the second half of 1206. Upon King Andrew's initiative, Pope Innocent III had already appealed to the Hungarian prelates and barons on 7 June to swear an oath of loyalty to the King's future son.

Queen Gertrude showed blatant favoritism towards her German relatives and courtiers, causing widespread discontent among the native lords. Taking advantage of her husband's campaign in the distant Principality of Halych, a group of aggrieved noblemen seized and murdered her in the forests of the Pilis Hills on 28 September 1213. King Andrew only punished one of the conspirators, a certain Count Peter, after his return from Halych. Although Béla was a child when his mother was assassinated, he never forgot her and declared his deep respect for her in many of his royal charters.

Andrew II betrothed Béla to an unnamed daughter of Tzar Boril of Bulgaria in 1213 or 1214, but their engagement was broken. In 1214, the King requested the Pope to excommunicate some unnamed lords who were planning to crown Béla king. Even so, the eight-year-old Béla was crowned in the same year, but his father did not grant him a province to rule. Furthermore, when leaving for a Crusade to the Holy Land in August 1217, King Andrew appointed John, Archbishop of Esztergom, to represent him during his absence. During this period, Béla stayed with his maternal uncle Berthold of Merania in Steyr in the Holy Roman Empire. Andrew II returned from the Holy Land in late 1218. He had arranged the engagement of Béla and Maria, a daughter of Theodore I Laskaris, Emperor of Nicaea. She accompanied King Andrew to Hungary and Béla married her in 1220.

The senior king ceded the lands between the Adriatic Sea and the Dráva River—Croatia, Dalmatia and Slavonia—to Béla in 1220. A letter of 1222 of Pope Honorius III reveals that "some wicked men" had forced Andrew II to share his realms with his heir. Béla initially styled himself as "King Andrew's son and King" in his charters; from 1222 he used the title "by the Grace of God, King, son of the King of Hungary, and Duke of all Slavonia".

Béla separated from his wife in the first half of 1222 upon his father's demand. However, Pope Honorius refused to declare the marriage illegal. Béla accepted the Pope's decision and took refuge in Austria from his father's anger. He returned, together with his wife, only after the prelates had in the first half of 1223 persuaded his father to forgive him. Having returned to his Duchy of Slavonia, Béla launched a campaign against Domald of Sidraga, a rebellious Dalmatian nobleman, and captured Domald's fortress at Klis. Domald's domains were confiscated and distributed among his rivals, the Šubići, who had supported Béla during the siege.

King Andrew transferred Béla from Slavonia to Transylvania in 1226. In Slavonia, he was succeeded by his brother, Coloman. As Duke of Transylvania, Béla adopted an expansionist policy aimed at the territories over the Carpathian Mountains. He supported the Dominicans' proselytizing activities among the Cumans, who dominated these lands. In 1227 he crossed the mountains and met Boricius, a Cuman chieftain, who had decided to convert to Christianity. At their meeting, Boricius and his subjects were baptized and acknowledged Béla's suzerainty. Within a year, the Roman Catholic Diocese of Cumania was established in their lands.

Béla had long opposed his father's "useless and superfluous perpetual grants", because the distribution of royal estates destroyed the traditional basis of royal authority. He started reclaiming King Andrew's land grants throughout the country in 1228. The Pope supported Béla's efforts, but the King often hindered the execution of his son's orders. Béla also confiscated the estates of two noblemen, brothers Simon and Michael Kacsics, who had plotted against his mother.

Béla's youngest brother, Andrew, Prince of Halych, was expelled from his principality in the spring of 1229. Béla decided to help him to regain his throne, proudly boasting that the town of Halych "would not remain on the face of the earth, for there was no one to deliver it from his hands", according to the Galician–Volhynian Chronicle. He crossed the Carpathian Mountains and laid siege to Halych together with his Cuman allies in 1229 or 1230. However, he could not seize the town and withdrew his troops. The Galician–Volhynian Chronicle writes that many Hungarian soldiers "died of many afflictions" on their way home.

Béla invaded Bulgaria and besieged Vidin in 1228 or 1232, but he could not capture the fortress. Around the same time, he set up a new border province, the Banate of Szörény (Severin, Romania), in the lands between the Carpathians and the Lower Danube. In a token of his suzerainty in the lands east of the Carpathians, Béla adopted the title "King of Cumania" in 1233. Béla sponsored the mission of Friar Julian and three other Dominican friars who decided to visit the descendants of the Hungarians who had centuries earlier remained in Magna Hungaria, the Hungarians' legendary homeland.

King Andrew died on 21 September 1235. Béla, who succeeded his father without opposition, was crowned king by Robert, Archbishop of Esztergom in Székesfehérvár on 14 October. He dismissed and punished many of his father's closest advisors. For instance, he had Palatine Denis blinded and Julius Kán imprisoned. The former was accused of having, in King Andrew's life, an adulterous liaison with Queen Beatrix, the King's young widow. Béla ordered her imprisonment, but she managed to escape to the Holy Roman Empire, where she gave birth to a posthumous son, Stephen. Béla and his brother Coloman considered her son a bastard.

Béla declared that his principal purpose was "the restitution of royal rights" and "the restoration of the situation which existed in the country" in the reign of his grandfather, Béla III. According to the contemporaneous Roger of Torre Maggiore, he even "had the chairs of the barons burned" in order to prevent them from sitting in his presence during the meetings of the royal council. Béla set up special commissions which revised all royal charters of land grants made after 1196. The annulment of former donations alienated many of his subjects from the King. Pope Gregory IX protested strongly at the withdrawal of royal grants made to the Cistercians and the military orders. In exchange for Béla's renouncing of the taking back of royal estates in 1239, the Pope authorized him to employ local Jews and Muslims in financial administration, which had for decades been opposed by the Holy See.

After returning from Magna Hungaria in 1236, Friar Julian informed Béla of the Mongols, who had by that time reached the Volga River and were planning to invade Europe. The Mongols invaded Desht-i Qipchaq—the westernmost regions of the Eurasian Steppes—and routed the Cumans. Fleeing the Mongols, at least 40,000 Cumans approached the eastern borders of the Kingdom of Hungary and demanded admission in 1239. Béla only agreed to give them shelter after their leader, Köten, promised to convert together with his people to Christianity, and to fight against the Mongols. However, the settlement of masses of nomadic Cumans in the plains along the Tisza River gave rise to many conflicts between them and the local villagers. Béla, who needed the Cumans' military support, rarely punished them for their robberies, rapes and other misdeeds. His Hungarian subjects thought that he was biased in the Cumans' favor, thus "enmity emerged between the people and the king", according to Roger of Torre Maggiore.

Béla supported the development of towns. For instance, he confirmed the liberties of the citizens of Székesfehérvár and granted privileges to Hungarian and German settlers in Bars (Starý Tekov, Slovakia) in 1237. Zadar, a town in Dalmatia which had been lost to Venice in 1202, acknowledged Béla's suzerainty in 1240.

The Mongols gathered in the lands bordering Hungary and Poland under the command of Batu Khan in December 1240. They demanded Béla's submission to their Great Khan Ögödei, but Béla refused to yield and had the mountain passes fortified. The Mongols broke through the barricades erected in the Verecke Pass (Veretsky Pass, Ukraine) on 12 March 1241.

Duke Frederick II of Austria, who arrived to assist Béla against the invaders, defeated a small Mongol troop near Pest. He seized prisoners, including Cumans from the Eurasian Steppes who had been forced to join the Mongols. When the citizens of Pest realized the presence of Cumans in the invading army, mass hysteria emerged. The townsfolk accused Köten and their Cumans of cooperating with the enemy. A riot broke out and the mob massacred Köten's retinue. Köten was either slaughtered or committed suicide. On hearing about Köten's fate, his Cumans decided to leave Hungary and destroyed many villages on their way towards the Balkan Peninsula.

With the Cumans' departure Béla lost his most valuable allies. He could muster an army of less than 60,000 against the invaders. The royal army was ill-prepared and its commanders—the barons alienated by Béla's policy—"would have liked the king to be defeated so that they would then be dearer to him", according to Roger of Torre Maggiore's account. The Hungarian army was virtually annihilated in the Battle of Mohi on the Sajó River on 11 April 1241. A great number of Hungarian lords, prelates and noblemen were killed, and Béla himself narrowly escaped from the battlefield. He fled through Nyitra to Pressburg (Nitra and Bratislava in Slovakia). The triumphant Mongols occupied and ravaged most lands to the east of the Danube River by the end of June.

Upon Duke Frederick II of Austria's invitation, Béla went to Hainburg an der Donau. However, instead of helping Béla, the Duke forced him to cede three counties (most probably Locsmánd, Pozsony, and Sopron). From Hainburg, Béla fled to Zagreb and sent letters to Pope Gregory IX, Emperor Frederick II, King Louis IX of France and other Western European monarchs, urging them to send reinforcements to Hungary. In the hope of military assistance, he even accepted Emperor Frederick II's suzerainty in June. The Pope declared a Crusade against the Mongols, but no reinforcements arrived.

The Mongols crossed the frozen Danube early in 1242. A Mongol detachment under the command of Kadan, a son of Great Khan Ögödei, chased Béla from town to town in Dalmatia. Béla took refugee in the well-fortified Trogir. Before Kadan laid siege to the town in March, news arrived of the Great Khan's death. Batu Khan wanted to attend at the election of Ögödei's successor with sufficient troops and ordered the withdrawal of all Mongol forces. Béla, who was grateful to Trogir, granted it lands near Split, causing a lasting conflict between the two Dalmatian towns.

Upon his return to Hungary in May 1242, Béla found a country in ruins. Devastation was especially heavy in the plains east of the Danube where at least half of the villages were depopulated. The Mongols had destroyed most traditional centers of administration, which were defended by earth-and-timber walls. Only well-fortified places, such as Esztergom, Székesfehérvár and the Pannonhalma Abbey, had successfully resisted siege. A severe famine followed in 1242 and 1243.

Preparation for a new Mongol invasion was the central concern of Béla's policy. In a letter of 1247 to Pope Innocent IV, Béla announced his plan to strengthen the Danube—the "river of confrontations"—with new forts. He abandoned the ancient royal prerogative to build and own castles, promoting the erection of nearly 100 new fortresses by the end of his reign. These fortresses included a new castle Béla had built at Nagysáros (Veľký Šariš, Slovakia), and another castle Béla and his wife had built at Visegrád.

Béla attempted to increase the number of the soldiers and to improve their equipment. He made land grants in the forested regions and obliged the new landowners to equip heavily armoured cavalrymen to serve in the royal army. For instance, the so-called ten-lanced nobles of Szepes (Spiš, Slovakia) received their privileges from Béla in 1243. He even allowed the barons and prelates to employ armed noblemen, who had previously been directly subordinated to the sovereign, in their private retinue (banderium). Béla granted the Banate of Szörény to the Knights Hospitaller on 2 June 1247, but the Knights abandoned the region by 1260.

To replace the loss of at least 15 percent of the population, who perished during the Mongol invasion and the ensuing famine, Béla promoted colonization. He granted special liberties to the colonists, including personal freedom and favorable tax treatment. Germans, Moravians, Poles, Ruthenians and other "guests" arrived from neighboring countries and were settled in depopulated or sparsely populated regions. He also persuaded the Cumans, who had in 1241 left Hungary, to return and settle in the plains along the River Tisza. He even arranged the engagement of his firstborn son, Stephen, who was crowned king-junior in or before 1246, to Elisabeth, a daughter of a Cuman chieftain.

Béla granted the privileges of Székesfehérvár to more than 20 settlements, promoting their development into self-governing towns. The liberties of the mining towns in Upper Hungary were also spelled out in Béla's reign. For defensive purposes, he moved the citizens of Pest to a hill on the opposite side of the Danube in 1248. Within two decades their new fortified town, Buda, became the most important center of commerce in Hungary. Béla also granted privileges to Gradec, the fortified center of Zagreb, in 1242 and confirmed them in 1266.

Béla adopted an active foreign policy soon after the withdrawal of the Mongols. In the second half of 1242 he invaded Austria and forced Duke Frederick II to surrender the three counties ceded to him during the Mongol invasion. On the other hand, Venice occupied Zadar in the summer of 1243. Béla renounced Zadar on 30 June 1244, but Venice acknowledged his claim to one third of the customs revenues of the Dalmatian town.

Béla set up a defensive alliance against the Mongols. He married three of his daughters to princes whose countries were also threatened by the Mongols. Rostislav Mikhailovich, a pretender to the Principality of Halych, was the first to marry, in 1243, one of Béla's daughters, Anna. Béla supported his son-in-law to invade Halych in 1245, but Rostislav's opponent, Daniil Romanovich repulsed their attack.

On 21 August 1245 Pope Innocent IV freed Béla of the oath of fidelity he had taken to Emperor Frederick during the Mongol invasion. In the following year Duke Frederick II of Austria invaded Hungary. He routed Béla's army in the Battle of the Leitha River on 15 June 1246, but perished in the battlefield. His childless death gave rise to a series of conflicts, because both his niece, Gertrude, and his sister, Margaret, made a claim to Austria and Styria. Béla decided to intervene in the conflict only after the danger of a second Mongol invasion had diminished by the end of the 1240s. In retaliation of a former Austrian incursion into Hungary, Béla made a plundering raid into Austria and Styria in the summer of 1250. In this year he met and concluded a peace treaty with Daniil Romanovich, Prince of Halych in Zólyom (Zvolen, Slovakia). With Béla's mediation, a son of his new ally Roman married Gertrude of Austria.

Béla and Daniil Romanovich united their troops and invaded Austria and Moravia in June 1252. After their withdrawal, Ottokar, Margrave of Moravia—who had married Margaret of Austria—invaded and occupied Austria and Styria. In the summer of 1253, Béla launched a campaign against Moravia and laid siege to Olomouc. Daniil Romanovich, Boleslaw the Chaste of Cracow, and Wladislaw of Opole intervened on Béla's behalf, but he lifted the siege by the end of June. Pope Innocent IV mediated a peace treaty, which was signed in Pressburg (Bratislava, Slovakia) on 1 May 1254. In accordance with the treaty, Ottokar, who had in the meantime become King of Bohemia, ceded Styria to Béla.

Béla appointed his son-in-law, Rostislav Mikhailovich Ban of Macsó (Mačva, Serbia) in 1254. Rostislav's task was the creation of a buffer zone along the southern borders. He invaded Bosnia already in the year of his appointment and forced Tzar Michael Asen I of Bulgaria to cede Belgrade and Barancs (Braničevo, Serbia) in 1255. Béla adopted the title of King of Bulgaria, but he only used it occasionally in the subsequent years.

The Styrian noblemen rose up in rebellion against Béla's governor Stephen Gutkeled and routed him in early 1258. Béla invaded Styria, restored his suzerainty and appointed his oldest son, Stephen, Duke of Styria. In 1259, Batu Khan's successor, Berke, proposed an alliance by offering to marry one of his daughters to a son of Béla, but he refused the Khan's offer.

Discontented with the rule of Béla's son, the Styrian lords sought assistance from Ottokar of Bohemia. Béla and his allies—Daniil Romanovich, Boleslaw the Chaste, and Leszek the Black of Sieradz—invaded Moravia, but Ottokar vanquished them in the Battle of Kressenbrunn on 12 June 1260. The defeat forced Béla to renounce Styria in favor of the King of Bohemia in the Peace of Vienna, which was signed on 31 March 1261. On the other hand, Ottokar divorced his elderly wife, Margarete of Austria, and married Béla's granddaughter—the daughter of Rostislav Mikhailovich by Anna—Kunigunda.

Béla had originally planned to give his youngest daughter, Margaret, in marriage to King Ottokar. However, Margaret, who had been living in the Monastery of the Blessed Virgin on Rabbits' Island, refused to yield. With the assistance of her Dominican confessor, she took her final religious vows which prevented her marriage. Infuriated by this act, the King, who had up to that time supported the Dominicans, favored the Franciscans in the subsequent years. He even became a Franciscan tertiary, according to the Greater Legend of his saintly sister, Elisabeth.

Béla and his son, Stephen jointly invaded Bulgaria in 1261. They forced Tzar Constantine Tikh of Bulgaria to abandon the region of Vidin. Béla returned to Hungary before the end of the campaign, which was continued by his son.

Béla's favoritism towards his younger son, Béla (whom he appointed Duke of Slavonia) and daughter, Anna irritated Stephen. The latter suspected that his father was planning to disinherit him. Stephen often mentioned in his charters that he had "suffered severe persecution" by his "parents without deserving it" when referring to the roots of his conflict with his father. Although some clashes took place in the autumn, a lasting civil war was avoided through the mediation of the Archbishops Philip of Esztergom and Smaragd of Kalocsa who persuaded Béla and his son to make a compromise. According to the Peace of Pressburg, the two divided the country along the Danube: the lands to the west of the river remained under the direct rule of Béla, and the government of the eastern territories was taken over by Stephen, the king-junior.

The relationship between father and son remained tense. Stephen seized his mother's and sister's estates which were situated in his realm to the east of the Danube. Béla's army under Anna's command crossed the Danube in the summer of 1264. She occupied Sárospatak and captured Stephen's wife and children. A detachment of the royal army, under the command of Béla's Judge royal Lawrence forced Stephen to retreat as far as the fortress at Feketehalom (Codlea, Romania) in the easternmost corner of Transylvania. The king-junior's partisans relieved the castle and he started a counter-attack in the autumn. In the decisive Battle of Isaszeg, he routed his father's army in March 1265.

It was again the two archbishops who conducted the negotiations between Béla and his son. Their agreement was signed in the Dominican Monastery of the Blessed Virgin on Rabbits' Island (Margaret Island, Budapest) on 23 March 1266. The new treaty confirmed the division of the country along the Danube and regulated many aspects of the co-existence of Béla's regnum and Stephen's regimen, including the collection of taxes and the commoners' right to free movement.

The "nobles of all Hungary, who are called servientes regis" from both the senior and the junior king's domains assembled in Esztergom in 1267. Upon their request, Béla and Stephen jointly confirmed their privileges, which had first been spelled out in the Golden Bull of 1222, before 7 September. Shortly after the meeting, Béla assigned four noblemen from each county with the task of revising property rights in Transdanubia.

King Stephen Uroš I of Serbia invaded the Banate of Macsó, a region under the rule of Béla's widowed daughter, Anna. A royal army soon routed the invaders and captured Stephen Uroš. The Serbian monarch was forced to pay ransom before being released.

Béla's favorite son, also named Béla, died in the summer of 1269. On 18 January 1270 the King's youngest daughter, the saintly Margaret, also died. King Béla too soon fell terminally ill. On his deathbed, he asked his grandson-in-law King Ottokar II of Bohemia to assist his wife, daughter and partisans in case they were forced to leave Hungary by his son. Béla died on Rabbits' Island on 3 May 1270. Dying at 63, he exceeded in age most members of the House of Árpád. He was buried in the church of the Franciscans in Esztergom, but Archbishop Philip of Esztergom had his corpse transferred to the Esztergom Cathedral. The Minorites only succeeded in regaining Béla's remains after a long lawsuit.

King Béla IV of Hungary left to his son, to Stephen, a prosperous, a rebuilt, a fortified kingdom in 28 years. Béla successfully concluded the alliance between the houses of Árpád and Anjou with a mutual marriage contract. In the last year of his life, in December 1269, Abbot of Monte Cassino Bernhard Ayglerius visited Hungary as the envoy of King Charles I of Anjou. He reported enthusiastically to his lord, the foreign, impartial contemporary envoy saw Béla's court as follows:

"The Hungarian royal house has incredible power, its military forces are so large that nobody in the East and the North dares even budge if the triumphant and glorious king mobilizes his army. Most of the countries and princes of the North and East belong to his empire by kinship or conquest."

Béla's wife, Maria Laskarina was born in 1207 or 1208, according to historian Gyula Kristó. She died in July or August 1270. Their first child, Kunigunda, was born in 1224, four years after her parents' marriage. She married Boleslaw the Chaste, Duke of Cracow in 1246.

A second daughter, Margaret followed Kunigunda in about 1225; she died unmarried before 1242. The third daughter of Béla, Anna was born around 1226. She and her husband, Rostislav Mikhailovich were especially favored by Béla. Her great-grandson, Wenceslaus—a grandson of her daughter, Kunigunda by King Ottokar II of Bohemia—was King of Hungary from 1301 to 1305.

Béla's fourth daughter, Catherina died unmarried before 1242. Next, Elisabeth was born; she was given in marriage to Henry XIII, Duke of Bavaria in about 1245. Her son, Otto was crowned King of Hungary in 1305, but was forced to leave the country by the end of 1307. Béla's sixth daughter Constance married, around 1251, Lev Danylovich, second son of Prince Daniil Romanovich of Halych. Béla's seventh daughter, Yolanda became the wife of Bolesław the Pious, Duke of Greater Poland.

Béla's first son, Stephen was born in 1239. He succeeded his father. Béla's youngest daughter, Margaret was born during the Mongol invasion in 1242. Dedicated to God by her parents at birth, she spent her life in humility in the Monastery of the Blessed Virgin on Rabbits' Island and died as a Dominican nun. The King's youngest (namesake) son, Béla was born between around 1243 and 1250.

The Greater Legend of Saint Elisabeth of Hungary (Béla's sister) described Béla's family as a company of saints. It wrote that the "blessed royal family of the Hungarians is adorned with resplendent pearls that irradiate all the earth". In fact, the Holy See sanctioned the veneration of three daughters of Béla and his wife: Kunigunda was beatified in 1690, Yolanda in 1827; and Margaret was canonized in 1943. A fourth daughter, Constance also became subject to a local cult in Lemberg (Lviv, Ukraine), according to the Legend of her sister, Kunigunda.

The following family tree presents Béla's offspring, and some of his relatives mentioned in the article.

Andrew II of Hungary ∞(1)Gertrude of Merania ∞(2)Yolanda de Courtenay ∞(3)Beatrice d'Este

(1) Béla IV ∞Maria Laskarina

(1) St Elisabeth

(1) Coloman, Duke of Slavonia

(1) Andrew, Prince of Halych

(1) and (2) two daughters

(3) Stephen the Posthumous

St Kunigunda ∞Boleslav V of Cracow

Margaret

Anna ∞Rostislav Mikhailovich

Catherina

Elisabeth ∞Henry XIII of Bavaria

Constance ∞Lev Danylovich

Blessed Yolanda ∞Boleslav of Greater Poland

Stephen V of Hungary ∞Elisabeth the Cuman

Saint Margaret

Béla, Duke of Slavonia ∞Kunigunde of Brandenburg

Bryan Cartledge writes that Béla "reorganised the structure of government, re-established the rule of law, repopulated a devastated countryside, encouraged the growth of towns, created the new royal town of Buda and revived the commercial life of the country" during his over three-decade-long reign. Béla's posthumous epithet—the "second founder of the state" (Hungarian: második honalapító)—shows that posterity attributed to him Hungary's survival of the Mongol invasion. On the other hand, the Illuminated Chronicle notes that Béla "was a man of peace, but in the conduct of armies and battles the least fortunate" when narrating Béla's defeat in the Battle of Kressenbrunn. The same chronicle preserved the next epigram which was written on his tomb:

• Béla IV Encyclopædia Britannica

Béla IV of Hungary House of Árpád Born: 1206 Died: 3 May 1270
Regnal titles
Vacant Title last held by Andrew	Duke of Slavonia 1220–1226	Succeeded by Coloman
New creation	Duke of Transylvania 1226–1235	Vacant Title next held by Stephen
Preceded by Andrew II	King of Hungary and Croatia 1235–1270	Succeeded by Stephen V
Preceded by Ottokar as opposing claimant	Duke of Styria 1254–1258