This is one aspect of the mod I am still not happy with. Castles were a huge part of Medieval history and I would like it represented well. In Medieval England before 1066 castles were few and far between. The ones there were of the motte and bailey type built of wood and earth. After William the Conqueror showed up he needed castles to keep order in his new lands. Castles were excellent in controlling the population as well as blocking enemy advancement. One could not simply go around a castle and its garrison as the garrison could come out and attack from the rear. William had hundreds of castles built. After each revolt he'd build a new castle. It wasn't till after the crusades when people brought back new castle building technologies that the hay day of castle building really begun. Castles most times where built near cities for protection, but often times towns where built up around Castles as people migrated there for the security. In the game I use to have a feature were you could take a load of lumber and or stone to a spot and "build a castle" which would turn into a Castle settlement but no one used this feature so I removed it. So, we have two options basically. Either Castles are Improvements or they function as a town. As Towns To have them function as town there would need to be limits perhaps on the number of goods and number of buildings. I would really want to be able to change the graphic so that Castles don't look like sprawling cities, not sure how to do that. As Improvements Perhaps as Improvements they could function similar to my forts mod where they have limited storage capacity and maybe auto gather surrounding resources. Graphically they would look better as improvements. Ways to build castles Since no one used the Transport with Materials feature what would be the best way to simulate the Building of a castle? As Improvements it would take time to build but only cost gold, which really doesn't do justice to the amount of resources required to build a castle. Perhaps we can use the plotgroup feature to require a route connected to the plot in order to transport materials needed for the castle project. We could also maybe have a special Castle Constructor unit that the player can build in his cities they would go out and build a castle. Anyway, these are some of my initial ideas on this, feel free to add your own.