Isabelle Jagellon , known as the queen Isabelle , was born in 1519 and died in 1559. She was the wife of Jean Szapolyai (1487 - 1540), king of Hungary of 1526 with 1540, and the mother of Jean Sigismond Szapolyai (1540 - 1571), king of Hungary and prince of Transylvania. She died in 1559.

Isabelle Jagellon

Isabelle Jagellon was the first child of the second marriage (devoted in 1518) of Sigismond Ier the Old man, (1467 - 1548), king of Poland and large-duke of Lithuania, and Bona Sforza (1494 - 1559), girl of Jean Galéas Sforza, duke of Milan. His/her brothers and sisters were Sigismond II Auguste (1520 - 1572), king de Pologne, Anne (1523 - 1596), wife of Etienne Bathory king de Pologne and Catherine (1526 - 1583), wife of Jean III of Sweden.

The March 2nd 1539, it marries with Székesfehérvár king Jean Ier of Hungary, which after many fights with Ferdinand Ier of the Holy roman Empire assoie thus its legitimacy. But two years later, the July 22nd 1541 with Szeben, fifteen days after the birth of their son Jean Sigismond Szapolyai, Jean Ier dies, entrusting regency to his wife and her adviser Giorgio Martinuzzi, known as the Gyorgi monk.

The Isabelle queen

As a regent one calls it more usually the Isabelle queen, taking into account his strong personality and of his tenacity to protect the succession from Jean Ier and to ensure the perenniality of the crown of Hungary for his son, against the Turkish army of Soliman, against the ambitious one of the Gyorgy Monk, the Ferdinand emperor Ist.

It makes elect her son Jean II quickly king de Hongrie by the partisans of Jean Ier, and this in spite of the treaty of Nagyvárad with the Holy roman Empire, its tutor being consequently Giorgio Martinuzzi, become cardinal. The court settles with Buda, that Ferdinand hastens to besiege to obtain total supremacy on Hungary. The Soliman sultan takes again his conquests and in 1542 it gains battle on battle, which obliges the sovereigns of the Habsbourg to make concessions: Hungary is divided between the sultan in the east, Ferdinand in the west and Jean II in Transylvania, since Alba Iulia.

But from the conflicts are born quickly between it and Martinuzzi: in 1549, for military reasons vis-a-vis Turkish, the tutor of Jean II signs the Convention of Nyirbator which recognizes the suzerainty of Ferdinand Ier in Transylvania, and this without the knowledge of the queen, which it works in silence to reunify the region, which envisages the renunciation of the throne of Hungary of Jean II, with the help of an financial equalization and territorial, and the recognition of Ferdinand Ier like only sovereign elected official of Hungary. The Isabelle queen denounces the treaty and reaffirms the rights of her son, but it must abdicate the June 19th 1551, and be withdrawn with Jean-Sigismond in Silesia while the diet of Kolozsvár of the July 26th 1551 recognizes Ferdinand Ier like only sovereign. In exchange, the Martinuzzi ex-regent is named Voïvode of Transylvania.

In front of the occupation of Transylvania by Habsbourg, Soliman invades in his turn the province and the Diète of Transylvania recalls in 1556 Jean II and its mother, from now on only tutor, to control under Turkish monitoring. The queen-mother thus spends her last years of her life near her son and dies in 1559.