Notre-Dame de Paris(Our Lady of Paris), is a historic Catholic cathedral on the eastern half of the Île de la Cité in the fourth arrondissement of Paris. The cathedral is widely considered to be one of the finest examples of French Gothic architecture, and it is among the largest and most well-known church buildings in the world. The naturalism of its sculptures and stained glass are in contrast with earlier Romanesque architecture.

As the cathedral of the Archdiocese of Paris, Notre-Dame is the parish that contains the cathedra, or official chair, of the archbishop of Paris. The cathedral treasury is notable for its reliquary which houses some of Catholicism's most important first-class relics including the purported Crown of Thorns, a fragment of the True Cross, and one of the Holy Nails.