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.  Thus Austria, Bohemia and Hungary, so singularly and harmoniously united under Albert V., so suddenly dissevered and scattered by the death of Albert, were now, after years of turmoil, all reuniting under the child Ladislaus.

Frederic, however, the faithful guardian of the young prince, was devoting the utmost care to his education, and refused to accede to the urgent and reiterated requests to send the young monarch to his realms.  When Ladislaus was about ten years of age the Emperor Frederic visited the pope at Rome, and took Ladislaus in his glittering suite.  The precocious child here astonished the learned men of the court, by delivering an oration in Latin before the consistory, and by giving many other indications of originality and vigor of mind far above his years.  The pope became much attached to the youthful sovereign of three such important realms, and as Frederic was about to visit Naples, Ladislaus remained a guest in the imperial palace.

Deputies from the three nations repaired to Rome to urge the pope to restore to them their young sovereign.  Failing in this, they endeavored to induce Ladislaus to escape with them.  This plan also was discovered and foiled.  The nobles were much irritated by these disappointments, and they resolved to rescue him by force of arms.  All over Hungary, Bohemia and Austria there was a general rising of the nobles, nationalities being merged in the common cause, and all hearts united and throbbing with a common desire.  An army of sixteen thousand men was raised.  Frederic, alarmed by these formidable preparations for war, surrendered Ladislaus and he was conveyed in triumph to Vienna.  A numerous assemblage of the nobles of the three nations was convened, and it was settled that the young king, during his minority, should remain at Vienna, under the care of his maternal uncle, Count Cilli, who, in the meantime, was to administer the government of Austria.  George Podiebrad was intrusted with the regency of Bohemia; and John Hunniades was appointed regent of Hungary.