I lived in Paris 9 years from 2000 to 2009, then lived abroad and I currently live in the south of France. I have to admit that when I went back to Paris 2015,

I lived in Paris 9 years from 2000 to 2009, then lived abroad and I currently live in the south of France. I have to admit that when I went back to Paris 2015, the one thing that struck me was the dirt on the buildings like "le Louvres"'s musueum façade on the Rivoli street. It looked almost black. I actually did not really notice when I lived there, maybe it worsen. Also I agree with you that Paris is a dirty city and London (at least the tourist areas) is much cleaner. There are a lot of incivilities in France and cleaning services are not known for their efficency. As for safety, I also agree even if I have read that there has been many knife or moped attacks in London recently.