Nantes Cathedral, or the Cathedral of St. Peter and St. Paul of Nantes, is a Roman Catholic Gothic cathedral located in Nantes, Pays de la Loire, France. Construction began in 1434, on the site of a Romanesque cathedral, and took 457 years to finish in 1891. It has been listed since 1862 as a monument historique by the French Ministry of Culture. The plain façade is largely compensated for by the polish of the interior of the building. The whiteness of the stone, accentuated by recent restoration work, the imposing dimensions of the nave and the aisles and the effect of the immense inner column create a Gothic atmosphere inside the cathedral.

Inside the cathedral are the tomb of Francis II, Duke of Brittany (position 10) and of his wife Marguerite de Foix, the (parents of Anne of Brittany), made at the beginning of the 16th century by Michel Colombe and Jean Perréal. The cathedral also houses the cenotaph of General de Lamoricière (position 23), a monument set up in 1878 in papal homage to him.