Built with wood from trees cut down in 1180! This is the stave church in the most original condition. It is very dark inside and it takes some time for your eyes to adjust and be able to see more detail. (Doesn't help when some selfish tourist decides he wants a better photo and uses flash after reading the notice asking not to do this.)
There are good information boards, models, pictures, diagrams etc, inside the cafe/souvenir shop.
Definitely worth doing if you are in this part of Norway.