Traffic / Metro."Construction du chemin de fer metropolitain municipal de Paris; travers閑 de la Seine au Ch鈚elet - station" Place Saint-Michel "; fon鏰ge du caisson de la station; vue int閞ieure de la chambre de travail; vers la porte de Clignancourt".(Construction of the Paris metro; crossing the Seine at Ch鈚elet - "Place Saint-Michel" station; advancing the caisson of the station; interior view of the working chamber; towards the Porte de Clignancourt).Photo; January 17; 1907 (Charles Maindron).PH3143;Paris; Mus閑 Carnavalet.