Neotrantor
Neotrantor, or 'New Trantor', became the de facto 'capital' of the Empire, after Gilmer sacked Trantor. The planet was originally called Delicass, and rules over only 20 planets. Delicass and its attendant worlds consisted of a 'Planetary Granary' for Trantor herself, which is only 3 Parsecs distant, and whose primary is a bright star in the crowded skies of this province. Politically, it is ruled by a corrupt governor, Jord Commason.
The last mentioned Emperor of the Galaxy, Dagobert IX and his son, the Crown prince, died on this planet. It is stated that the dynasty lasted for about half a century.
Neotrantor has a similar significance in the history of the Galactic Empire as Ravenna did for the remnant Roman Empire.
Read more about this topic: List Of Foundation Universe Planets