Seine-et-Oise

Seine-et-Oise was a former department of France covering much of the western, northern, and southern metropolitan area around Paris. Created on 4 March 1790 during the French Revolution, it was named for the two principal rivers crossing its territory, the Seine and the Oise. Its prefecture was Versailles, and it carried the administrative number 78. The department almost completely encircled the Seine department, whose territory included Paris, although the two departments met across only a relatively narrow area in the east near the Seine and the neighboring Seine-et-Marne department. The department combined densely settled suburban zones, expanding industrial areas, market towns, agricultural districts, and extensive rural territory. Its administrative boundaries and arrondissement structure changed repeatedly as the Paris metropolitan area grew and local government requirements evolved. In the final period of its existence, its arrondissements included Étampes, Évry, Palaiseau, Argenteuil, Montmorency, Pontoise, Mantes, Rambouillet, Saint-Germain-en-Laye, and Versailles. Versailles remained the prefecture and an important administrative and historical center. Seine-et-Oise grew substantially during the nineteenth and twentieth centuries as population and economic activity moved outward from central Paris. At the first French census in 1801, it had 421,535 inhabitants. By the time of its dissolution in 1968, it covered 5,658 square kilometres and contained 688 communes, with a population of 2,943,350. This made it France's second-largest department by population at that time, behind the Seine department. Its size, uneven urbanization, and close relationship with the rapidly expanding Paris suburbs made it increasingly difficult to administer as a single territorial unit. The department was abolished on 1 January 1968 under a reorganization of the departments of the Paris metropolitan area. Its territory was primarily divided among the newly established departments of Yvelines, Essonne, and Val-d'Oise. Yvelines received 262 communes in the central part, including Versailles, and inherited the administrative number 78. Essonne received 198 communes in the south and was assigned number 91, while Val-d'Oise received 184 communes in the north and was assigned number 95. Smaller portions of the former department were combined with parts of the former Seine department to form Hauts-de-Seine, Val-de-Marne, and Seine-Saint-Denis. The three principal successor departments are collectively associated with the grande couronne, or greater ring of suburbs, together with Seine-et-Marne. Although Seine-et-Oise no longer exists as an administrative department, its former territory remains important for understanding the historical development and administrative geography of the Paris metropolitan region. At the 1999 census, the combined population of the former territory had reached 4,554,426, reflecting continuing suburbanization after the department's abolition.

Seine-et-Oise was established on 4 March 1790 as part of the administrative restructuring undertaken during the French Revolution. Its territory was named after the Seine and Oise rivers and was organized around Versailles, which served as its prefecture. The new department occupied the areas west, north, and south of Paris and almost completely surrounded the Seine department, the administrative territory that included the capital. During its existence, Seine-et-Oise contained a mixture of urban suburbs, small towns, agricultural communities, forests, and areas increasingly integrated into the Parisian metropolitan economy. Its boundaries and internal administrative divisions were adjusted several times. The growth of transport links and suburban settlement gradually changed the department from a predominantly rural and semi-rural territory into one containing extensive urban and industrial belts around Paris. Its population rose from 421,535 in the 1801 census to 2,943,350 by 1968. In its final administrative configuration, the department had ten arrondissements: Étampes, Évry, Palaiseau, Argenteuil, Montmorency, Pontoise, Mantes, Rambouillet, Saint-Germain-en-Laye, and Versailles. It contained 688 communes and covered 5,658 square kilometres. The combination of its large area, rapid population growth, and highly varied settlement patterns made it increasingly unwieldy to govern alongside the neighboring Seine department. A reform of the Paris-region departmental structure took effect on 1 January 1968. Seine-et-Oise was abolished and its territory was distributed among several successor departments. The central portion, comprising 262 communes, became Yvelines, with Versailles as its prefecture. Yvelines also inherited the former department's administrative number 78. The southern portion, consisting of 198 communes, became Essonne and received number 91. The northern portion, consisting of 184 communes, became Val-d'Oise and received number 95. The remaining portions were combined with parts of the former Seine department. Eighteen communes of Seine-et-Oise joined 29 communes from Seine to form Val-de-Marne; sixteen joined 24 Seine communes to form Seine-Saint-Denis; and nine joined 27 Seine communes to form Hauts-de-Seine. Consequently, the former department's historical territory is now divided among six modern departments, although Yvelines, Essonne, and Val-d'Oise contain the great majority of it. The reorganization did not end the historical significance of Seine-et-Oise. Its successor departments became part of the grande couronne, the outer suburban ring of the Paris region, together with Seine-et-Marne. The former department also remains a useful reference point for demographic and urban history. By the 1999 census, the population living within its former boundaries had reached 4,554,426, demonstrating the scale of suburban expansion that had continued after its dissolution. Seine-et-Oise is therefore best understood as a former territorial unit rather than a commercial brand or operating organization.

• 1999

  Population of the former territory

  [1]Seine-et-Oiseen.wikipedia.org

  The 1999 census counted 4,554,426 people within the historical territory of Seine-et-Oise, reflecting continued suburban growth around Paris.

• 1968

  Abolition and territorial reorganization

  [1]Seine-et-Oiseen.wikipedia.org

  On 1 January 1968, Seine-et-Oise was dissolved and its territory was redistributed mainly among Yvelines, Essonne, and Val-d'Oise, with smaller portions incorporated into Hauts-de-Seine, Val-de-Marne, and Seine-Saint-Denis.

• 1801

  First recorded census population

  [1]Seine-et-Oiseen.wikipedia.org

  The first French census recorded 421,535 inhabitants in Seine-et-Oise.

• 1790

  Creation of the department

  [1]Seine-et-Oiseen.wikipedia.org

  Seine-et-Oise was created on 4 March 1790 during the French Revolution as one of France's new departments. Its name referred to the Seine and Oise rivers.

Historical territorial-administrative entity of France; not a commercial brand.

• 1968

  Dissolution and division of the departmentStrategy

  Background

  The department and the neighboring Seine department had become too large and complex to administer effectively as Paris and its suburbs expanded.

  Action taken

  Seine-et-Oise was abolished and its communes were redistributed among six successor departments, principally Yvelines, Essonne, and Val-d'Oise.

  Aftermath

  The reorganization created a more granular departmental structure for the Paris metropolitan area. Yvelines inherited the former administrative number 78, while the other successor departments received numbers 91 and 95 or were created through combinations with former Seine territory.

  Source

1. 1Seine-et-Oiseen.wikipedia.org