Thanks pluton. After having spent 18 years in Lille, I try to keep my eyes peeled.
Thanks Akira.I do not put much value on coincidences, but here's one I just discovered : "en passant" is not just "passing by" and a chess term, but happens to be the title of the sole theater play written by Raymond Queneau. It was first staged in 1947, using backdrop photographs by... Brassaï.