Geath

Geath was a city located on an unnamed planet. It had a democratic government and was at peace for twelve thousand years. All this changed when Beol and his brother discovered a mechanical dragon which produced Enamour and figured out how it could manipulate emotions. They used it to make the people of Geath elect Beol as their leader, and then to make him their king. Years later, the Eleventh Doctor, Amy Pond and Rory Williams visited Geath. They saved the city from the Herald and the Regulator and freed the people from Enamour. (NSA: The King's Dragon)