Overview
Pontoise is a commune north of Paris, France. It is located from the centre of Paris, in the "new town" of Cergy-Pontoise.
Administration
Pontoise is the official (capital) of the Val-d'Oise département, although in reality the préfecture building and administration, as well as the department council (conseil général), are located in the neighboring commune of Cergy, which is regarded as the de facto capital of Val-d'Oise.
Pontoise is also the seat of the Arrondissement of Pontoise. The sous-préfecture building and administration, unlike the préfecture, are located inside the commune of Pontoise.
Sister cities
The city of Pontoise has three sister city relationships with:
Böblingen, Germany since 1956
Sevenoaks, United Kingdom since 1964
Geleen, Netherlands since 1962
From Wikipedia (CC BY-SA 4.0).