age. The stone secretes calcium when wet, so automatically bleaches itself.
At the bottom of the hill is the Pigalle area - the red-light district. Around the back of the basilica is Place du Tertre where artists will clamour to paint or sketch your portrait.
On the right is the Moulin Rouge on Boulevard de Clichy. This was the home of the can-can, but is now largely a place for tourists. Moulin means windmill in French, and at one time there were over 30 working windmills in the Montmartre area.
The fuzzy image above was taken from the roof of the Montparnasse Tower at night.