I used Saint Chapelle as a comparison to my TCP2 (Chartres Cathedral). I did not know that this magnificent building was only created in two years! That blows my mind because it seems that the exquisite detail and beautiful stained glass windows would consume more time. I also thought it was cool that the windows told stories and it helped many illiterate church-goers. I agree that this should be preserved because it is indeed an amazing structure that represents devotion to faith. 

Is all of the glass in Saint Chapelle the original glass? Has there been repairs or replacements?