Château de Monbijou Monbijou was the Roco-style residence of the Queen of Prussia when she was living privately in Berlin. Considered as one of the jewels of the Royal Prussian palaces, Monbijou was the home to some of the greatest moments of the early Prussian court. Expanded over a period of four decades, what began as a small garden pavilion on the edge of the Spree grew to be one of the largest pleasure parks in Berlin. The palace is situated on the Spree River, just a few hundred metres north of the great Berlin City Castle. This is one of our numerous court residences, but it is not our primary residence.