| Cem Sultan | |||||
|---|---|---|---|---|---|
 A modified copy of Cem's portrait by Pinturicchio | |||||
| Sultan of the Ottoman Empire (claimant) | |||||
| Reign | 28 May 1481 − 20 June 1481 | ||||
| Sanjak-bey of Karaman | |||||
| Reign | 1474 – 1481 | ||||
| Sanjak-bey of Kastamonu | |||||
| Reign | 1469 – 1474 | ||||
| Born | 22 December 1459 Adrianople Palace, Edirne, Rumelia, Ottoman Empire | ||||
| Died | February 25, 1495 (aged 35) Capua, Kingdom of Naples | ||||
| Burial | |||||
| Consort | Gülşirin Hatun | ||||
| Issue |
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| Dynasty | Ottoman | ||||
| Father | Mehmed II | ||||
| Mother | Çiçek Hatun | ||||
| Religion | Sunni Islam | ||||
| Tughra |  | ||||
Cem Sultan (also spelled Djem or Jem) or Sultan Cem or Şehzade Cem (22 December 1459 – 25 February 1495, pronounced [ˈdʒem sulˈtaːn]; Ottoman Turkish: جم سلطان, romanized: Cem sulṭān; Turkish: Cem Sultan; French: Zizim), was a claimant to the Ottoman throne in the 15th century.
Cem was the third son of Sultan Mehmed II and younger half-brother of Sultan Bayezid II, and thus a half-uncle of Sultan Selim I of Ottoman Empire.
After being defeated by Bayezid, Cem went in exile in Egypt and Europe, under the protection of the Mamluks, the Knights Hospitaller of St. John on the island of Rhodes, and ultimately the Pope.