[1] The exact date of Ladislaus's birth is unknown, but it is likely that he was born around 1200, according to historians Gyula Kristó and Ferenc Makk.

[1] After falling seriously ill, King Emeric ordered Ladislaus's coronation in an attempt to secure a smooth succession for his infant son.

[4] Pope Innocent III sent a letter to Duke Andrew, warning him to respect the child king's interests.

[2] However, refusing to heed Innocent's warning, Andrew seized the money that Emeric had deposited in the Pilis Abbey for Ladislaus.

[2][6] Although Duke Andrew made every effort to capture Queen Constance and King Ladislaus before they could escape, they were able to reach Vienna, Austria.