Cathédrale Notre-Dame-Immaculée (Cathedral of Our Lady of the Immaculate Conception), also known as Saint Nicholas Cathedral (name of the old church which was demolished in 1874), Monaco Cathedral (French: Cathédrale de Monaco), is the cathedral of the Roman Catholic Archdiocese of Monaco in Monaco-Ville, Monaco, where many of the Grimaldis were buried, including Grace Kelly and more recently, Rainier III.