He was said to be the son of the sister of his predecessor, Saint Stephen (István I) and the doge of Venice. Because of his Italian descent he is classified as a non-dynastic king. Unlike Stephen, he was unable to properly rule the nation and got into conflict with the largely pagan nobility.
His reign ended when the nobility started the so-called Vatha pagan rising.
A year of instability followed and finally in 1047 the Árpád dynasty was restored with Andrew (András) I
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