I'm basically writing an AU fic, with princes and princesses. So does anyone know any good places to look for information on how royalty would treat each other, particularly those of different countries?

Also, if a younger princess (no not the heir to the throne) was to visit the royal court of another country, who would she be most likely greeted by, where would she be greeted (as in outside the palace, inside the palace, or even at the borders of the country), and what would be the expectations of how she spent her time?

How would the rest of the court be likely to treat them?

I know that I'm asking for a lot, so if any of you guys have anything that you think might help, such as websites or other information, even if I haven't specifically asked for it, that would be great!