Throneworld (Hope)

The Imperial Throneworld was, according to Silver's records, the heart of the Empire. It orbited the Prime Sun in the same galaxy as Endpoint and A2756. Its southern region was covered in great furnace cities that clogged the air with pollution from their great smoke stacks, visible from hundreds of miles away. It was ruled by an Empress. (PROSE: Hope)

Behind the scenes

 * In PROSE: Hope, the rulers of the Imperial Throneworld are never explicitly confirmed to be the Imperial Family from PROSE: Father Time. However, COMIC: Miranda confirms that Endpoint is in the domain of the Needle. The Empress is therefore presumably Miranda Dawkins or another relative of the Emperor. Lance Parkin notes in Whoniverse: A Guide that the Imperial Throneworld mentioned in Hope is the same one ruled by Miranda Dawkins.
 * The description of the Throneworld and its forgecities is similar to that of Gallifrey Eight in PROSE: The Taking of Planet 5.