Basilica of St. Nazaire and St. Celsus, Carcassonne
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The Basilica of St. Nazaire and St. Celsus, Carcassonne (Basilique Saint-Nazaire-et-Saint-Celse de Carcassonne), formerly St. Nazaire's Cathedral, Carcassonne (Cathédrale Saint-Nazaire-et-Saint-Celse de Carcassonne) is a basilica minor and national monument of France.
It was the cathedral of Carcassonne until 1801, when it was replaced by St. Michel's Cathedral.