I couldn't help but notice much of patterning on the doors of the final chamber of the Raven Sanctum in Bjora Marches is identical to the dwarven runes Thunderhead Peaks. Also, the serpentine patterning all over other aspects of the Sanctum are also the same as Thunderhead as well. While I know that Norn and Dwarves both live/lived in the Shiverpeaks, you all think that alone would be enough to explain the shared use (despite the great differences in philosophy/religion/lifestyle)? Do Norn have a habit of hiring Dwarven contractors or taking over living spaces the latter moved out of?
I'm guessing it was just texture or design re-use, which I'm fine with. But if there's a cooler explanation out there, I want to hear it!