There is a security check for entry into the Sainte Chapelle. Sharp objects are not allowed (corkscrews, Swiss Army knives etc.) and may be confiscated. We will make every effort to minimize disruptions to our tours caused by third-party employees We are not responsible for any loss associated with events out of our immediate control. Comfortable walking shoes are advised. There are 422 steps to the top of the towers at Notre Dame. The stairway is vey narrow in areas with small windows. If these conditions make you feel unconfortable you can skip this part of the tour. All of our tours operate rain or shine.