Mehmed I (Ottoman Turkish: چلبی محمد, Mehmed I or Mehmed Çelebi) (1381, Bursa – May 26, 1421, Edirne, Ottoman Sultanate) was the Ottoman Sultan (Rûm) from 1413 to 1421. He was one of the sons ofBayezid I and Devlet Hatun. Mehmed's reign was marked by theOttoman Interregnum, a civil war that divided the Sultanate. He managed to reunite the Sultanate before his death in 1421.
Born in Bursa in 1390 to sultan Bayezid I and one of his wives, Devlet Hatun, Mehmed was the third oldest son of Bayezid. Along with his brothers from various mothers, including Süleyman Çelebi, İsa Çelebi,Mustafa Çelebi, and Musa Çelebi, Mehmed had the title Çelebi, meaning "gentleman."