Gazi Husrev-beg (Ottoman Turkish: غازى خسرو بك, Gāzī Ḫusrev Beğ; Modern Turkish: Gazi Hüsrev Bey; 1480–1541) was a Bosniak Ottoman sanjak-bey (governor) of the Sanjak of Bosnia in 1521—1525, 1526—1534, and 1536—1541. He was known for his major contribution to the improvement of the structural development of Sarajevo urban area and his construction of many important buildings there, such as the Gazi Husrev-beg Mosque or the medresa Kuršumlija, as well as for his successful conquests and for the launching of further Ottoman expansion into Croatia.
He was born in Serres, Greece, to a Bosnian Muslim father Ferhad (a convert from the Trebinje region), and a Turkish mother Selçuka, who was the daughter of the Sultan Bayezid II, making Gazi Husrev-Beg Beyazid II's grandson.
In less than three years, he conquered the fortresses of Knin, Skradin and Ostrovica. He was appointed sanjak-bey of the Sanjak of Bosnia on 15 September 1521, becoming one of Sultan Suleiman I's most trusted men.