 Nyora kupfuurira kweiyi ndima - Papa Calixtus III akadzokorora pfungwa huru dzeDum Diversas mubhuku rake makore mana gare gare, Inter Caetera. Zvakare Papa akanga achiedza kuunganidza rutsigiro nokuda kwehondo yokurwisana nokufambira mberi kwevaTurkey. Vanuncio vakanga vatumwa kunyika dzose dzeEurope kundokumbira machinda kuti abatanezve mukuedza kudzivisa ngozi yokupinda kweTurkey. Zvisinei, machinda eEurope akanga anononoka kupindura kudanwa napapa, zvikurukuru nemhaka yemakwikwi avo vamene orudzi. Musi waJune 29, 1456, Callixtus akarayira kuti mabhero echechi aridzwe masikati ona bhero remasikati sekudanidzira kunamatira kugara zvakanaka kweavo vanodzivirira Belgrade. Mauto aitungamirirwa naJanos Hunyady, Captain-General weHungary, akasangana nevaTurkey ndokuvakunda paBelgrade musi wa22 Chikunguru 1456. 