Awesome, thanks very much TrueMalice. Though at the risk of sounding like an ingrate, would it be possible to get a version that relied on province OR ruler culture? I *think* OR ( vanilla requirement code, your mod's code) would give the result that old buildings of province culture wouldn't get torn down when a new cultured ruler took over, but the new culture chain would start at the first level. For example, a Will the Conqueror game would leave the Saxon heavy infantry tradition intact at first with a lot of investment needed to build up a new Norman cavalry tradition. Eventually, as the provinces converted culture, the Saxon infantry would die out and be replaced with knights. Or the conqueror could go native, not build the stables, and adopt heavy infantry while tutoring his heir to switch culture.