The Glass Tower
Der gläserne Turm (original)
Starring Lilli Palmer, O.E. Hasse, Peter van Eyck, Brigitte Horney, Hannes Messemer, Fritz Hinz-Fabricius, Ludwig Linkmann, Gerd Brüdern, Else Ehser, Werner Stock
It's a drama and romance movie, and has a rating of 6.6 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Denmark.