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.
Amiens Cathedral (Cathédrale Notre-Dame d'Amiens) is the tallest Gothic church and largest cathedral in France. Along with the cathedrals of Chartres and Reims, Amiens is a member of the illustrious triad of "High Gothic" or "Classical" French cathedrals built in the 13th century. Amiens Cathedral was designated a UNESCO World Heritage Site in 1981 for the beauty and harmony of its art and architecture.