London, born and raised!
You are correct Buckingham Palace is the main Palace where the queen lives.
See here on Wikipedia for a list of each royals' (many) residences. https://en.wikipedia.org/wiki/List_of_British_royal_residences
btw (but hard to implement maybe) but i think it would be awesome if you could see in a quiz the percentages of nationalities that took a quiz. (Even better if it is per answer, but that would clutter everything up)