Mehmed II, commonly known as Mehmed the Conqueror, was twice the sultan of the Ottoman Empire from August 1444 to September 1446 and then later from February 1451 to May 1481.
Portrait of Mehmet II by Gentile Bellini, dating 1480
Accession of Mehmed II in Edirne, 1451
Roumeli Hissar Castle, built by Sultan Mehmed II between 1451 and 1452, before the Fall of Constantinople
The entry of Sultan Mehmed II into Constantinople, painting by Fausto Zonaro (1854–1929)
John Hunyadi was a leading Hungarian military and political figure in the Kingdom of Hungary during the 15th century. According to most contemporary sources, he was the member of a noble family of Wallachian ancestry. Through his struggles against the Ottoman Empire, he earned for himself the nickname 'Turk-buster' from his contemporaries. Due to his merits, he quickly received substantial land grants. By the time of his death, he was the owner of immense land areas, totaling approximately four million cadastral acres, which had no precedent before or after in the Kingdom of Hungary. His enormous wealth, his military and political weight were primarily directed towards the purposes of the Ottoman wars.
John Hunyadi depicted in the 15th-century Chronica Hungarorum (Brno, 1488)
King Sigismund of Hungary's charter of the grant of Hunyad Castle (in present-day Hunedoara, Romania) to Voyk, Magos and Radol (the sons of Serbe), and their uncle or cousin, Radol, and Voyk's son, John
Sigismund, King of Hungary
John Hunyadi (John Thuróczy – Chronica Hungarorum, 1488)