Fortress (main building)
Can be upgraded to max. level 20.
The higher the main building's level the more wood and stone can be secured from fortress attacks. You should regularly click on the woodcutter's hut and the quarry to secure the resources in the main building of the fortress!
Hall of knights
Can be upgraded up to level 20.
The secondary function of the fortress (main building) is a community achievement. The whole guild can collect points here. Each upgrade level adds one point. The higher the total value of all guild members, the better and more valuable the gems from the gem mine become.