They exist right in the middle of us, most of the time invisible, and are known by different names in different countries and times. People who carry all their precious few belongings in a plastic bag or a trolley, and seen sitting at the corner down the street, even the street that has shops that sell shoes just like mine (really!) for 500 Euros. At present in France they are called SDF (sans domicile fixe), and exist in numbers more than a million in France itself. But for me, this photo taken right in front of Notre Dame Cathedral in the heart of Paris isn’t about homelessness. It is about loneliness.