Oranienbaum (help·info) is a former town and a former municipality in the district of Wittenberg, in Saxony-Anhalt, Germany. Since 1 January 2011, it is part of the town Oranienbaum-Wörlitz. It is situated south of the Elbe, east of Dessau.
The former settlement of Nischwitz was renamed in 1673 after Countess Henriette Catherine of Nassau, a scion of the House of Orange-Nassau (Dutch: Oranje-Nassau) and princess consort of the then ruling Prince John George II of Anhalt-Dessau. From 1683 on she had the Oranienbaum Palace erected according to plans by the Dutch architect Cornelis Ryckwaert. The parks are today included into the Dessau-Wörlitz Garden Realm, a UNESCO World Heritage Site since 2000.
- Oranienbaum Palace, park and Chinese garden with pagoda
- Baroque parish church, built in 1712
- Monument Path with 29 stations
- Historical market square
- Dutch architectural style of the 19th century