Cem Sadisi (Cem Saʿdīsi, Saʿdī-i Cem, "Saʿdī of [Prince] Cem") was a ninth/fifteenth century high culture ( divan ) poet and the best known of the "Cem Poets". His real name is Sadullah (Saʿdullāh), although in his poems he used the pen name Sadi (Saʿdī). His father's name was Mustafa. He was born in Sivrihisar (formerly Karahisar, Seferihisar) in west central Anatolia (Beyani [Beyānī],40; Āli [ʿĀlī], 137), but some biographers give his birthplace as Siroz, an area near to the larger town of Sivrihisar, close to the province (