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The Jagiellonian dynasty became one of the leading royal houses in Europe. The great triumph of his reign was bringing Prussia under Polish rule.[2] The rule of Casimir corresponded to the age of "new monarchies" in western Europe. By the 15th century, Poland had narrowed the distance separating it from Western Europe and became a significant power in international relations. The demand for raw materials and semi-finished goods stimulated trade, producing a positive balance, and contributed to the growth of crafts and mining in the entire country.[3] He was a recipient of the English Order of the Garter (KG), the highest order of chivalry and the most prestigious honour in England.
Following Casimir's death in 1492, John I Albert succeeded him as King of Poland, and Alexander Jagiellon was proclaimed Grand Duke of Lithuania.[4]
Youth
Casimir Jagiellon was the third and youngest son of King Władysław II Jagiełło and his fourth wife, Sophia of Halshany.[5] He often relied on his instinct and feelings and had little political knowledge, but shared a great interest in the diplomacy and economic affairs of the country. Throughout Casimir's youth, Bishop Zbigniew Oleśnicki was his mentor and tutor, however, the cleric felt a strong reluctance towards him, believing that he would be an unsuccessful monarch following Władysław's death.
Grand Duke of Lithuania
The sudden death of Sigismund Kęstutaitis left the office of the Grand Duchy of Lithuania empty. The Voivode of Trakai, Jonas Goštautas, and other magnates of Lithuania, supported Casimir as a candidate to the throne. However many Polish noblemen hoped that the thirteen-year-old boy would become a Vice-regent for the Polish King in Lithuania.[6] Casimir was invited by the Lithuanian magnates to Lithuania, and when he arrived in Vilnius in 1440, he was proclaimed as the Grand Duke of Lithuania on 29 June 1440 by the Council of Lords, contrary to the wishes of the Polish noble lords — an act supported and coordinated by Jonas Goštautas.[6] When the news arrived in the Kingdom of Poland concerning the proclamation of Casimir as the Grand Duke of Lithuania, it was met with hostility, even to the point of military threats against Lithuania.[6] Since the young Grand Duke was underage, the supreme control over the Grand Duchy of Lithuania was in the hands of the Lithuanian Council of Lords, presided by Jonas Goštautas. Casimir was taught Lithuanian language and the customs of Lithuania by appointed court officials.[7][8][9]
During Casimir's rule the rights of the Lithuanian nobility — dukes, magnates, and boyars (lesser nobles), irrespective of their religion and ethnicity — were put on an equal footing to those of the Polish szlachta. Additionally, Casimir promised to protect the Grand Duchy's borders and not to appoint persons from the Polish Kingdom to the offices of the Grand Duchy. He accepted that decisions on matters concerning the Grand Duchy would not be made without the Council of Lords' consent. He also granted the subject region of Samogitia the right to elect its own elder. Casimir was the first ruler of Lithuania baptized at birth, becoming the first native Roman Catholic Grand Duke.
That same year, Casimir was approached by the Prussian Confederation for aid against the Teutonic Order, which he promised, by making the separatist Prussian regions a protectorate of the Polish Kingdom. However, when the insurgent cities rebelled against the Order, it resisted and the Thirteen Years' War (1454–1466) ensued. After a long and expensive war, Casimir and the Prussian Confederation defeated the Teutonic Order. In the Second Peace of Thorn (1466), the Order recognized Polish sovereignty over the seceded western Prussian regions, Royal Prussia, and the Polish crown's overlordship over the remaining Teutonic Monastic State, transformed in 1525 into a duchy, Ducal Prussia.
Elisabeth's only brother Ladislaus, king of Bohemia and Hungary, died in 1457, and after that Casimir and Elisabeth's dynastic interests were directed also towards her brother's kingdoms.
The intervention of the Roman curia, which hitherto had been hostile to Casimir, was due to the permutations of European politics. The pope was anxious to get rid of the Hussite King of Bohemia, George Podebrad, as the first step towards the formation of a league against the Ottoman Turks. Casimir was to be a leading factor in this combination, and he took advantage of it to procure the election of his son Vladislaus II as the King of Bohemia. But he would not commit himself too far, and his ulterior plans were frustrated by the rivalry of Matthias Corvinus, King of Hungary, who even went so far as to stimulate the Teutonic Order to rise against Casimir. The death of Matthias in 1490 was a great relief to Poland, and Casimir employed the two remaining years of his reign in consolidating his position still further.[11]
In 1490, Casimir's son John Albert was elected the King of Hungary by a party among the Hungarian nobles. He was, however, defeated by his older brother, King Vladislaus II of Bohemia. Casimir, who wanted to secure a separate realm for his sons, proposed John Albert. Most Hungarian barons and prelates preferred Vladislaus because his rule in Bohemia had indicated that he would respect their liberties. Vladislaus was crowned King of Hungary on 18 September 1490 in Székesfehérvár.
Casimir was interred at Wawel Cathedral in Kraków, in a red marble tomb sculpted by Veit Stoss.[12] In 1973 a research team of 12 experts opened the tomb. Shortly afterward, 10 of the team died prematurely. It was subsequently found that the deaths were caused by toxins originating from fungus present in the tomb.[13]
Children
Vladislaus (1 March 1456 – 13 March 1516); combined the thrones of Hungary and Bohemia as Vladislaus II.
Hedwig Jagiellon (21 September 1457 – 18 February 1502); married George the Rich, of the Wittelsbach dynasty of Bavaria. Delegates had gone to Kraków to negotiate the marriage, and their "Landshut Wedding" took place in Bavaria with much pomp and celebration in 1475, starting a tradition which continues to this day.
Casimir Jagiellon (3 October 1458 – 4 March 1484); was to have married Kunigunde of Austria, but instead chose religious life, eventually being canonized as Saint Casimir.
John I of Poland (27 December 1459 – 17 June 1501); succeeded Casimir IV as the king of Poland (1492–1501)
J. Kiaupienė Valdžios krizės pabaiga ir Kazimieras Jogailaitis. Gimtoji istorija 2: Nuo 7 iki 12 klasės (Lietuvos istorijos vadovėlis). CD. (2003). Elektroninės leidybos namai: Vilnius.
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