Potsdam is a city located in northern Germany near Berlin. It was originally the residence of the powerful Hohenzollern family who ruled the region for hundreds of years. They built stunning castles and parks in Potsdam, making it a beautiful place to live. Some of the most famous sights built by the Hohenzollern include Sanssouci Palace, the New Palace, and Cecilienhof Castle where the Potsdam Conference was held after World War 2. Today Potsdam remains an important historic city known for its royal past and cultural landmarks.