Later we walked up Montmartre to Sacre Coeur (image below) to look across a foggy Paris, and then went to see the beautiful and ordered "Place des Vosges", a park surrounded by a square courtyard of houses for the king's courtiers. From there we walked to Bastille where a monument gives testimony to the opening act of the French Revolution.
After another excellent dinner we had a final stroll up the street from the hotel to say a farewell to the Arc de Triomphe (with Eiffel Tower shining through the fog). Tomorrow we are off to Lyon on the way into Switzerland. Farewell Paris, we've loved it here.