Highest Point in Paris

What is the highest point in Paris? Montmartre? La montagne Sainte Geneviève? None of those... It's 40 rue du Télégraphe, in the 20th arrondissement (148,48 m - 162.4 yards). Montmartre is only second (130 m - 142 yards). The interesting part is that this "summit" is precisely located in La rue du Télégraphe, because that is where the first telegraph was used by its inventor, Claude Chappe. I could not believe it was already 2 centuries ago, in 1791, between Paris and Lille (north of France)!