Blacksmith Upgrade in Fief

[Nathan]

Hi just wondering what advantage does the blacksmith upgrade to a castle fief provide??

[Montblanc]

I think the fief improvements all do the same, they increase the amount of rent you receive from that fief. They also increase the prosperity of that fief. At least from what I observed in my playthroughs, the description of my villages would change with each improvement, from extreme poverty to a recovering economy (a fief that had been looted prior to being awarded to me).