mills and dye houses. His successor, Louis XV, whose daughter was a nun in the Carmelite convent, took a lively interest in the city: he added a chapel to the convent and also renovated the buildings of the royal abbey.
During the French Revolution, not only was the city renamed "Franciade" from 1793 to 1803, but the royal necropolis was looted and destroyed. The remains were removed from the tombs and thrown together; during the French Restoration, since they could not be sorted out anymore, they were reburied in a common ossuary.
The last king to be interred in Saint-Denis was Louis XVIII. After France became a republic and an empire, Saint-Denis lost its association with royalty.
On 1 January 1860, the city of Paris was enlarged by annexing neighboring communes. On that occasion, the commune of La Chapelle-Saint-Deniswas disbanded and divided between the city of Paris, Saint-Denis, Saint-Ouen, and Aubervilliers. Saint-Denis received the north-western part of La Chapelle-Saint-Denis.
During the 19th century, Saint-Denis became increasingly industrialized. Transport was much improved: in 1824 the Canal Saint-Denis was constructed, linking the Canal de l'Ourcq in the northeast of Paris to the River Seine at the level of L'Île-Saint-Denis, and in 1843 the first railway reached Saint-Denis. By the end of the century, there were 80 factories in Saint-Denis.
The presence of so many industries also gave rise to an important socialist movement. In 1892, Saint-Denis elected its first socialist administration, and by the 1920s, the city had acquired the nickname of la ville rouge, the red city. Until Jacques Doriot in 1934, all mayors of Saint-Denis were members of the Communist Party.
During the Second World War, after the defeat of France, Saint-Denis was occupied by the Germans on 13 June 1940. There were several acts of sabotage and strikes, most notably on 14 April 1942 at the Hotchkiss factory. After an insurgency
