Once upon a time, the cathedral, our Lady of Strasbourg, used to be pink. Pink sandstone, from the nearby Vosges mountain range. You can guess what happened: smoke during the last few centuries, pollution, weather, pigeons... She is rather dark now, a dirty greyish-brown. Cleaning the stone is never ending work... You can see the original color in the faces. Pink she was, pink she will be again, one day.
This was all carved on site 700-800 years ago. Totally amazing craftsmanship!!!!!