Seine (department) contains the administrative territorial entity Saint-Denis
General characteristics
From 1929 to its abolition in 1968, the department consisted of the City of Paris and 80 surrounding suburban communes. It had an area of 480 km² (185 sq. miles), 22% of that area being the City of Paris and 78% being suburbs. It was the only enclaved department in France. It was divided into three arrondissements: Paris, Sceaux and Saint-Denis.
For most of the Seine department's existence, its prefect also exercised direct authority over the City of Paris as well. As a result, Paris was the only commune without a mayor; it had theoretically less autonomy than the smallest commune.
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