In 1809 the reigning Ameer of Afghanistan, Shah Soojah-ul-Moolk, was dispossessed of his throne and an exile. Runjeet Singh, the Sikh ruler of Punjaub, plundered and imprisoned him at Lahore, and obtained from him the famous Koh-i-noor, the great diamond which is now among the crown jewels of Great Britain. Eventually Soojah escaped from Lahore and became a pensioner of the East India Company. For many years after the fall of Shah Soojah, anarchy ruled in Afghanistan, until in 1826 Dost Mahomed established himself upon the throne at Cabul.