By far the greatest blessing - a miracle - is that the Rosace Nord has survived. The South and West windows were very extensively restored in the 18th and 19th century, but the North Rose Window has stood basically unchanged for 800 years, the glass is the 13th century original. pic.twitter.com/Wwj8jeAVJM

— Incunabula (@incunabula) April 16, 2019