The Zwinger (Der Dresdner Zwinger) is a palace in Dresden, eastern Germany, built in Baroque style. It served as the orangery, exhibition gallery and festival arena of the Dresden Court. The location was formerly part of the Dresden fortress of which the outer wall is conserved. The name derives from the German word Zwinger (outer ward of a concentric castle); it was for the cannons that were placed between the outer wall and the major wall. The Zwinger was not enclosed until the Neoclassical building by Gottfried Semper called the Semper Gallery was built on its northern side. Today, the Zwinger is a museum complex that contains the Gemäldegalerie Alte Meister (Old Masters Picture Gallery), the Dresden Porcelain Collection (Porzellansammlung), the Armory (Rüstkammer) and the Mathematisch-Physikalischer Salon (Royal Cabinet of Mathematical and Physical Instruments). The Zwinger covers an area on the northwestern edge of the Innere Altstadt ("inner old town") that is part of the historic heart of Dresden. It is located in the immediate vicinity of other famous sights, including Dresden Palace and the Semperoper opera house. The Zwinger is bounded by Sophienstraße in the southeast, Postplatz in the south, Ostra-Allee in the southwest, the Am Zwingerteich road in the northwest and Theatre Square (Theaterplatz) in the east. Nearby buildings include the Dresden State Theatre to the southwest, the Haus am Zwinger to the south, the Taschenbergpalais hotel to the southeast, the west wing of the palace with its Green Vault to the east, the Altstädtische Hauptwache to the northeast, the Semper Opera to the north and the former royal stables to the northwest. Within view lie the Catholic Court Church and the Italian Village in Theatre Square, the Wilsdruffer Kubus on Postplatz and The Duchess Garden with the remnants of the former orangery building in the west. The terraced banks of the River Elbe are located 200 metres northeast of the Zwinger.

Above information is cited from wikipedia.org