I found a pretty damn fine public square on my recent visit to Paris. By stroke of luck, my Latin Quarter AirBnB was just around the corner, so it didn’t take me long to stumble upon Place de la Contrescarpe. Those of you who have been there know it is beautiful, walkable, well-scaled, and has some nice cafes, allowing one to sit and people watch. I did so on my first evening there, and made sure to return each morning and evening thereafter. I felt as though I’d found a little slice of urban perfection. The question is, are places like this simple or…