Buildings

From The Five Pillars

Houses give you population, which helps in gold income and helps in army upkeep.

Barracks give you recruitables(mostly human units) to serve in your army.

Workshops, the more you have of these the more buildings you can build per turn.

Temples are buildings that can raise your morale, heal units wounded in battle and make you find items on your travels.

Barriers help to block the spells some evil mages use.

Forts are the most important buildings there are, if you lose your forts, you die.