the 10th emperor of the Turks, was the eldest son of Mahomet I. and succeeded his father in 1421. He besieged Constantinople and Belgrade without success; but he took Theflalonica from the Venetians, and compelled the prince of Bosnia and John Castrion prince of Albania to pay him tribute. He obliged the latter to send his three sons as hostages; among whom was George, celebrated in history by the name of Scanderbeg. John Hunniades defeated Amurath's troops, and obliged him to make peace with the Christian princes in 1442. These princes afterwards breaking the peace, Amurath defeated them in the famous battle of Varna, November 10, 1444, which proved so fatal to the Christians, and in which Ladislaus king of Hungary was killed. Afterwards defeated Hunniades, and killed above 20,000 of his men; but George Castrion, better known by the name of Scanderbeg, being re-established in the estates of his father, defeated the Turks several times, and obliged Amurath to raise the siege of Croia, the capital of Albania. Amurath died, chagrined with his ill success, and infirm with age, February 11, 1451, at Adrianople. It is observed to this prince's honour, that he always kept his treaties with the greatest fidelity.