 It remained the cathedral of Carcassonne until 1803, when it lost the title to the present Carcassonne Cathedral ("Cathédrale Saint-Michel de Carcassonne").The Church of Saints Nazarius and Celsus obtained the status of historical monument in 1840.Around this time, the architect Eugène Viollet-le-Duc renovated the church along with the rest of the citadel.