Köpenick Castle is a historic palace located in the district of Köpenick in Berlin, Germany. Originally built in the 17th century, it served as a residence for the electors of Brandenburg. The castle is situated on an island in the Dahme River and features a beautiful baroque architecture, making it a notable landmark in the area. Today, Köpenick Castle houses the Museum of Decorative Arts, showcasing a collection of art and artifacts from various periods. The surrounding park offers scenic views and is a popular spot for visitors. The castle is an important part of Berlin's cultural heritage.