Karađorđević dynasty
His parents' oldest son, Aleksa, had died three years prior to Peter's birth, aged five, at which point Svetozar became heir. Peter did not become heir until Svetozar's death in 1847 at the age of six. Besides Belgrade, Peter spent much of his childhood in the town of Topola, from where the Karađorđević dynasty originated. He received his elementary education in Belgrade.