Without disturbing the old centre, the huge sheets of glass in the old gothic windows make the building look solid and delicate at the same time. As if it has become a huge aquarium.
The huge metal doors are opened on market days. See picture below (which I nicked from the internet). Jean Nouvel has recently designed the new Louvre museum building for Abu Dhabi (http://www.louvre.fr) and he has just completed the transformation of an old brewery in Barcelona: the Fabrica Moritz (http://www.designboom.com).
Enjoy the holidays for those of you away!