John Hunyadi, a Hungarian general and Regent-Governor of the Kingdom of Hungary
Anticipating an Ottoman invasion encouraged by the young and inexperienced new Ottoman sultan, Hungary co-operated with Venice and Pope Eugene IV to organize a new crusader army led by Hunyadi and Władysław III.
Vlad Dracul, the ruler of Wallachia, the father of the notorious Vlad Dracula, was imprisoned here, as he had fallen into disgrace with Hunyadi, not providing the help promised.
Following the battle of Marosszentimre (Romanian Sântimbru) in 1442, Hunyadi forcefully entered Wallachia and forced Dracul to submit.