This is a place you should go to see. There are books written about the building, up keep and renovations. It is an important church, as you will find when you visit. You may go to see the tombs of Catherine deMedici, Marie Antoinette, St Denis. You may marvel at the architecture or the grandness of the cathedral stained glass windows. Part with a few franks and pay a visit to the Tourism office. They are warm, inviting and informative. They have books and information in french, English, and dozens of other languages. Go. Look. Be inspired.