Hello, thank you very much for your comment. Those are images of my trip last year, I took advantage of the fact that we are in the autumn to share them. Indeed the windows were not very clean, but there were better points than others to make the photos. Everything is in the technique and the edition. The lens was as close as possible to the glass, I used a very small diaphragm aperture and of course, a lot of editing time removing stains and correcting colors.