In 1113, the city was recognized by King Louis VI of France, and in 1185 it was joined to the Crown of France. In 1597, Spanish soldiers held the city during the six-month Siege of Amiens, before Henry IV regained control. During the 18th and 19th century, the textile tradition of Amiens became famous for its velours. As a result of the French Revolution, the provinces of France were dismantled and the territory was organised into departments. Much of Picardy became the newly created department of Somme with Amiens as the departmental capital. During the industrial revolution, the city walls were demolished, opening up space for large boulevards around the town center. The Henriville neighborhood in the south of the city was developed around this time. In 1848, the first railway arrived in Amiens, linking the city to Boulogne-sur-Mer. During the 1870 Battle of Amiens, the city was occupied by invading Prussian forces.