The 400-years old street sign

This dead end used to be a street and first seen on the map dated 1650. Later it has been blocked by new buildings, but the stairs are still there. The sign still seen on the wall is actually from 1940s, made by the owner of block Percy Ahnhem himself, but even then the street was there. It became a dead end in the 1980s when the new building was built.

Read more: https://www.atlasobscura.com/places/percys-trappa-sign