An essential piece of clothing in a woman's closet, the little black dress has maintained its popularity thought all trends because it is always the "right" thing to wear. It is a timeless classic and all great designers have created their own variation. Didier Ludot owns the most famous vintage clothing store in Paris, the fashion capital of the world. The store, La Petit Robe Noire, is housed in the prestigious Palais Royal, just steps away from...