Mehmed II (; , ; 30 March 14323 May 1481), commonly known as Mehmed the Conqueror (; ), was the sultan of the Ottoman Empire twice, from August 1444 to September 1446 and then later from February 1451 to May 1481.

During Mehmed II's first reign, he defeated the crusade led by John Hunyadi after Hungarian incursions into his lands violated the Treaties of Edirne and Szeged. When Mehmed II ascended