Carthagonova is the capital of Rigel Prime and therefore the Star Kingdom of Rigel. The King and Queen reside in the palace.

It has a population of 2 billion, making it one of the most populous single cities in the entire Terran Sphere. This number accounts for roughly half of the planet's entire population.

Other notable locations include the Cathedral of Gaia, the Baronial Courthouse, and the King Racanis II Intersystem Spaceport. The city is divided into one administrative district, two independent boroughs, and four quarters.