What buildings are classified as FORTRESS
With the new knowledge upgrades, namely Attack, Defence and Fortress.
There seems to be a difference of opinion as to which buildings the upgrade refers to in my clan. Plarium refers to POP and Jot Throne as Fortress, but can't see them referencing Clan Stronghold or Towers of Fury.
Can someone please advise if all 4 above are classed as STRONGHOLDS or only the POP and Jot Throne