Bey Osman 1 Gazi

-https://en.wikipedia.org/wiki/Osman_I

Osman I or Osman Ghazi (Ottoman Turkish: عثمان غازى, romanized: ʿOsmān Ġāzī; Turkish: I. Osman or Osman Gazi; died 1323/4), sometimes transliterated archaically as Othman, was the founder of the Ottoman Empire (first known as the Ottoman Beylik or Emirate). While initially a small Turkoman principality during Osman's lifetime, his descendants transformed into a world empire in the centuries after his death. It existed until shortly after the end of World War I.

Owing to the scarcity of historical sources dating from his lifetime, very little factual information about Osman has survived. Not a single written source survives from Osman's reign, and the Ottomans did not record the history of Osman's life until the fifteenth century, more than a hundred years after his death. Because of this, historians find it very challenging to differentiate between fact and myth in the many stories told about him. One historian has even gone so far as to declare it impossible, describing the period of Osman's life as a "black hole".