Berlin is not only a historical city of the long 20th century but holds also relics of an anterior time. For example the Zitadelle Spandau which is one of the most well-preserved Renaissance forts in Europe. The old medieval castle was rebuilt in the 17th century in a “neo-Italian manner” by the elector Joachim II. In 1839 it was changed again in a neo-classical style.
The oldest parts of the Zitadelle are the donjon Juliusturm and the Palais which were built both in the 13th and 15th century. During World War II the area was used for military purposes.
The ancient arsenal houses a nice museum and it is definitely worth it to climb the wooden stairs of the Juliusturm. On the top you have a beautiful view over the west of Berlin where nature and city are close to each other. At the end of the day you should take a break in the historic tavern where you can enjoy the rustic atmosphere while eating with your hands.
The Zitadelle Spandau offers also many activities for kids: Discovering the Middle-age, art classes in the Kunstbastion (School of arts), puppet theatre and many more events. Just have a look at the programme. Another special event is the Citadel Music Festival which takes there every summer and features many concerts of national and international known bands.