Your captital cities also have a rank. They start at rank 1, and can level all the way up to rank 5.
Each new rank will give you access to more quests, more PQ's and more content in general in your city.
Also, the visual appearance of the city is supposed to change as it ranks up, and the NPC's will have different speech, most notably the guards.
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Morgrim - Ironclaw Server
Dwarf, Ironbreaker
Rank 40, Renown Rank 31
Immortal Guard Guild
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Loaar - Retired
Galka, Pheonix, Serene LS
RDM 75 / PUP 75 / NIN 75