Many thanks to my sister!
Notre Dame Cathedral (full name: Cathédrale Notre-Dame de Paris, "Our Lady of Paris") is a beautiful cathedral on the the Île de la Cité in Paris. Begun in 1163 and mostly completed by 1250, Notre Dame is an important example of French Gothic architecture, sculpture and stained glass.
The Notre Dame is the most popular monument in Paris and in all of France, beating even the Eiffel Tower with 13 million visitors each year. But the famous cathedral is also an active Catholic church, a place of pilgrimage, and the focal point for Catholicism in France - religious events of national significance still take place here.