Andrew I of Hungary

Andrew I the White or the Catholic (Hungarian: I. Fehér or Katolikus András/Endre; c. 1015 – before 6 December 1060) was King of Hungary from 1046 to 1060. He descended from a younger branch of the Árpád dynasty. After he spent fifteen years in exile, an extensive revolt by the pagan Hungarians enabled him to take the throne from King Peter Orseolo. He strengthened the position of Catholicism in the Kingdom of Hungary and successfully defended its independence against the Holy Roman Empire.

His efforts to ensure the succession of his son, Solomon, resulted in the open revolt of his brother Béla. Béla dethroned Andrew by force in 1060. Andrew suffered severe injuries during the fighting and died before his brother was crowned king.

Notable works: Constitutiones ecclesiasticae

Source: Wikipedia — https://en.wikipedia.org/wiki/Andrew_I_of_Hungary