Btw, that is the restaurant, or at least part of it.
The Maltermeister Tower, a 15th century watchtower on the Rammelsberg mines in Goslar, where copper and lead was mined from 900 until 1988.
Was mostly used as the office/workshop of the Maltermeister, the carpenter of the mines.
So the medieval overtones of that smoking arrangement fit the place.
Today a museum...