Dost Mohammad Khan Barakzai (Pashto/Persian: دوست محمد خان بارکزی; 23 December 1792 – 9 June 1863), nicknamed the Amir-i Kabir, Also titled Amir al-Mu'minin, was a member of the Barakzai dynasty and one of the prominent rulers of the Emirate of Afghanistan. His 37-year rule was important in the creation of modern Afghanistan. With the decline of the Durrani dynasty, he became the Emir of Kabul in 1826. He was the 11th son of Payendah Khan, chief of the Barakzai Pashtuns, who was killed in 1799 by Afghan Emperor Zaman Shah Durrani.