church: religion was very important for that time.
graveyard in that time honour was a must burying added honour
capitools were most of the time build at roads or rivers/oceans first people stayed there to set up a shop people followed him and little market settelments because huge city's

Your list would depend on the type of kingdom and the number of citizens.
For a relative small kingdom:

- Main hall: for government policy.
- Walls: usually out of wood sibce it is a small community.
- Farms: for generating foodstock
- Mine: for generatibg stone
- Stockpile: storage for all goods.
- Granery: storage for all food.
- Houses: to accomodate citizens.

Small kingdoms do not have high military activity, because of their low yield in resources. Also, small kingdoms do not build giant structures. This is because they'd not be able to defend it.

In big kingdoms:

- harbour: for trade and fish
- military academy: for military strategy.
- shooting range: to teach more accurate shootinh
- high walls and towers: to make the defences easier
- smith: to generate advanced swords
- craftingworkshop: to generate goods
- university: to discover more skills
- bank: to watch over the economy and trade (only applies if you actually have an economy)

Ofcourse the things a small kingdom has, will have to grow in efficiency.
I hope this will help you to build your kingdom. It is based on the growth of my own kingdom, Mystecia.

A cloud Kingdom never thought of that

A Drawbridge... over a cactus and lava pit

U guys all forgot something...secret doors are good in a castle. Arrow despensers for mobs...or dispencers with mobs in them... the evil.

Don't forget a market center.

wow classic thats funny that you have the same picture as my wallpaper on my desktop.

Oh ya

Don't forget the dungeon!

You could also add some farms outside of the kingdom.

Don't forget a wall around the kingdom
(make the farms outside of the wall)

Oh and of coarse you want a castle.

Well, to start they should have a nice wall in order to provide defense. Inside a kingdom will generally be essential structures for the survival of the people. These will include obvious things like houses for the kingdoms inhabitants, as well as places to get food and other essentials. I might include a few shops, a butchers shop, a building supply store, area for animals to stay (like a barn or animal pens), an alchemist store (potion brewing), a wood mill (for lumberjacks), an armory (for kingdom guards and weapons), an ore shop or miners place, and farms. You might also include a fort or keep for the ruler of your kingdom and lots of smaller houses for the inhabitants. I hope this was helpful!