Johan - I think, that there is a very good idea.
The possibility to upgrade the castles/towers etc.
Each castle/keep etc. should give additional bonuses, after they have been upgraded.
Example? You are upgrading a fortified city -> Population will grow faster. You upgrade it again -> More and lot stronger militia or other + bonuses, etc.
I think that would be awesome!
[ September 29, 2003, 16:01: Message edited by: Mortifer ]