To legitimate its usurped power he summoned a diet at Pilgram, in 1447, and submitted the following question: "Is it advantageous to the kingdom that Ladislaus should retain the crown, or would it not be more beneficial to choose a monarch acquainted with our language and customs, and inspired with love of our country ?" Warm opposition to this measure arose, and the nobles voted themselves loyal to Ladislaus.

While these events were passing in Bohemia, scenes of similar violence were transpiring in Hungary.

After a long series of convulsions, and Uladislaus, the Polish king, who had attained the crown of Hungary, having been slain in a battle with the Turks, a diet of Hungarian nobles was assembled and they also declared the young Ladislaus to be their king.

They consequently wrote to the Emperor Frederic, Duke of Styria, who had assumed the guardianship of the prince, requesting that he might be sent to Hungary.

Ladislaus Posthumous, so-called in consequence of his birth after the death of his father, was then but six years of age.
The Austrian States were also in a condition of similar confusion, rival aspirants grasping at power, feuds agitating every province, and all moderate men anxious for that repose which could only be found by uniting in the claims of Ladislaus for the crown.