West facade of the cathedral of Notre-Dame d'Amiens. This cathedral was built between 1220 and 1236. Amiens the tallest completed Gothic church and the largest cathedral in France http://www.flickr.com/photos/overton_cat/4824801346/
It's called Chartres Blue. It is a blue that is unrivaled in any stained glass in the world. Just a 40 minute trip from Paris, The cathedral stands out as a medieval skyline on the french plains as you approach the town. In a cathedral soaked country, Chartres is one of a kind. Don't miss the labrynth. The surrounding village is a great example of medieval architecture.