[Polydamas]

There are also the equivalent of lobbyists: people who want something from the prince, and are hanging around until he or someone important says yes. Depending on the lobbyist's status, that might involve going to parties, or it might involve sitting in lobbies and paying bribes to door-keepers and secretaries.

There are all the people associated with the prince's duties to heaven (which depending on culture and temperament might include people to transport a portable chapel, or flocks of beggar monks, or a really clever philosopher).

There are people who claim to have secret learning which lets them predict the future, whether they call themselves economists, readers of bird-signs, or astrologers.

There are ever more specific types of servants: have you really lived until you have separate teams of mounted falconers and foot falconers? Who are different from the boys of the leash who guide your packs of hunting hounds, or the people who tend your ponds of eels.

There are people to educate the children at court.

One of the Arab manuals specifically recommends finding someone who is cheerful and agreeable and never asks the prince for anything important.

In England some of the major departments were the pantry, buttery, wardrobe, exchequer, tailor, armourer, chapel, all the trades to do with hunting, all the trades to do with hauling the above around as the court migrates ...

Check out the section on courts at your local library and there should be something. Lots of people in the USA like the courts of Henry VIII and Elizabeth I of England. There is also Pepys' diary from the 17th century.