This house, and the neighboring houses (Milky Way (Mælkevejen) Christiania)) from 1864-65.
I don't know if the Germans during World War 2, may have replaced or just maintained the windows. But the window frames is from 1864-65.
Nova Huset, Mælkevejen, Christiania, Danmark.
en.wikipedia.org/wiki/Freetow...
da.wikipedia.org/wiki/Christi...
da.wikipedia.org/wiki/B%C3%A5...