This was the little folded paper of room and hotel information, and a map of the immediate area, that you got when you checked in, in 1969.  Lucky it was then, because Wikipedia tells what happened next:  “Hotel Hafnia at Vester Voldgade 23 was built in 1899 by architect Philip Smidth and burned down in a catastrophic fire on 1 September 1973 . 35 people died. The hotel, taken over by the neighboring Hotel Kong Frederik, was then rebuilt until 1976 in a slightly altered form.  Erik Solbakke Hansen was found guilty of starting the fire in 1986, however doubts later arose about Hansen’s conviction due to objectionable circumstances during the investigation.  One consequence of the fire was that stricter fire regulations were introduced, also for already existing buildings.”  Grade: 1