Schliengen is located in the district of Lörrach, Baden-Württemberg, in the very south-west of Germany in the proximity of the Black Forrest.

The name of the castle derives from the German words "Ente" and "Stein", which means duck and stone.

By 1525, Entenstein belonged to the nobles of Nagel von der Alten Schönstein and was thus transformed to a more representative manor house.

In 1725 Johann Conrad of Reinach-Hirtzbach, then Prince Bishop of Basel, bought Entenstein castle and used it as the seat of the Upper Bailiwick of Schliengen.

After 1857 Entenstein Castle which was then in the possession of the counts of Andlau, an old German noble house, was reconstructed.