0 An incredible Introduction of Osman Gazi – Founder of Sultanate Osmani 1299-1924 An incredible Introduction of Osman Gazi – Founder of Sultanate Osmani 1299-1924 The father of Sultante Osmani, Osman Gazi was born in 1258. He was third son of Ertugrul Gazi and Halime Sultan. Osman Gazi was a tall man with a ...