The city of New Heliopolis began as a moderate-sized city with the amazingly stupid name of Maxiscity.
The origional districts were, in order of founding, Alexandria, Heliopolis, Memphis, Annapolis, and Jerusalem. There was also the additional neighborhood of Arlington, but was not part of the origional five as it is nothing but an industrial wilderness and a stinky garbage dump.
Incidentally, Arlington and Annapolis are the only two not named after ancient cities.
In the beginning of New Heliopolis, space was tight and Maxiscity was becoming a popular place to live. They began competing for residents. It wasn't difficult. All five edventually grew into urban wastelands.
Then came the day that it was decided to move the kingdom's capitol to the new city. Two districts were in competition for selection, Alexandria and Heliopolis. The Alexandrians bulldozed the Metropark, which had been pastakingly built on a mouantain overlooking Heliopolis. They even bulldozed their CBD.
All thats left of the CBD is a few skyscrapers and the STAPLES Center.