Buildings
Wilderness - is land without any building on it, what you get from exploring and what you leave after pillaging.
Farms - Give food for a lot population and army, houses little population - can be destroyed in pillage.
Towns - House a lot of population and recruited army, population that generates geld - can be destroyed in pillage.
Nodes - Give mana, the main resource for performing magic - are not destroyed in pillages.
Workshops - Expensive buildings that control the speed at which you can build - can be destroyed in pillage.
Guilds - Buildings where you study magic, to learn spells and add them to your spellbook and to produce items - can be destroyed in pillage.
Barracks - Buildings where you train population to be recruited for your army - are not destroyed in pillages.
Fortress - Buildings that guard your kingdom and protect your army a bit in Siege battles - are not destroyed in pillages.
Barriers - Surreal buildings that give resistance against enemy magic from affecting your kingdom - are not destroyed in pillages.