Part of the Oslo Opera House.
There's almost too much in this reflection.
Looking through a corner of the glass part of the building, so there are two walls of glass - you can see the thin window frames.
The people sitting on the white roof can be seen through the glass, they are not reflections. However, everything above them is a combination of reflections and buildings & objects seen through the two glass walls.....phew!
I apologise if it scrambles your brain trying to figure it all out
Thanks as ever for bothering.