現存するヨーロッパ最古の木製階段

Oldest surviving set of wooden stairs in Europe was found in prehistoric Hallstatt salt mine (Christian von Tuschwerk) in Austria.

This 3100 years old staircase is 8m long and each step was 1.20m wide, meaning that miners could ascend and descend at same time.#archaeohistories pic.twitter.com/nL5mZCLeIC

— Archaeo - Histories (@archeohistories) October 22, 2022