Ahmed Tekuder, also known as Sultan Ahmad (reigned 1282–1284) was the sultan of the Ilkhan Empire, a Mongol Empire which stretched from eastern Turkey to Pakistan and covered most of Afghanistan. Tekuder was born Nicholas Tekuder Khan as a Nestorian Christian; however, Tekuder later embraced Islam and changed his name to Ahmed Tekuder. When Tekuder assumed the throne in 1282, he turned the Ilkhan empire into a sultanate. Tekudar zealously propagated his new faith and sternly required his ranking offices to do the same. The Ilkhan Empire ultimately adopted Islam as a state religion in 1295. The Church of the East was almost completely eradicated across Afghanistan and Persia during the reign of Timur (1336–1405).