This mod aims to make forts more useful by giving them access to taxes, more garrison and three mutually exclusive superbuildings. This mod has no French, German or Spanish localisation as of yet, because I simply don't speak those languages. This mod was written for CK2 2.5, it does not work with previous versions and is not ironman compatible as it changes checksum.
I explain a couple of things about the mod. It's a really small mod and it works exactly the same as any other building, only adding a bit of use to forts for anyone who isn't exactly near nomads or a nomad him/herself.