I don't think I'd heard of these before, but they look amazing - original wooden churches that can be hundreds of years old:
en.wikipedia.org
Apparently, there is a suggestion that the internal architecture at least is based on original Viking temple designs that are lost to us because they were also only ever made of wood.
Stave church - Wikipedia
Apparently, there is a suggestion that the internal architecture at least is based on original Viking temple designs that are lost to us because they were also only ever made of wood.