Notre-Dame de Paris is the cathedral of the Archdiocese of Paris, built on the Île de la Cité from 1163 under Bishop Maurice de Sully. A masterpiece of Gothic art, its construction extended until 1345 through several successive campaigns: choir, nave, western façade, then the twin towers, completed around 1240 and 1250, rising 69 metres. Restored in the 19th century by architect Eugène Viollet-le-Duc, who notably added the spire, it was inscribed in 1991 on the UNESCO World Heritage List as part of the Banks of the Seine. Devastated by a fire on 15 April 2019, the cathedral reopened to the public in December 2024 after a major restoration campaign.