Oranienburg is a town in Brandenburg. It is the capital of the district of Oberhavel. Oranienburg is a town located on the banks of the Havel river, 35 km north of the centre of Berlin. The original name of Oranienburg was Bötzow. The town was founded in the 12th century and was first mentioned in 1216. Albert the Bear is believed to have ordered the construction of a castle on the banks of the Havel. Around the castle there was a settlement of traders and craftsmen. In 1646, Friedrich Wilhelm I of Brandenburg married Louise Henriette of Orange-Nassau (German: Oranien-Nassau). She was so attracted by the town of Bötzow, that her husband presented the entire region to her. The princess ordered a new castle to be built in the Dutch style and called it Oranienburg or Schloss Oranienburg. In 1653, the town of Bötzow was renamed Oranienburg.
Silvio Gesell, the founder of Freiwirtschaft, lived in Oraninburg between 1911 an 1915, publishing his magazine, “Der Physiocrat”. He returned to the town in 1927 and lived there up to his death in 1930. The town remained a center of the free economy movement until it was outlwed by the Nazi regime in 1933, and many of Gessel’s followers ended up as prisoners in the town’s concentration camp.
One of the first Nazi concentration camps was built in Oranienburg in 1933. In 1936 it was replaced by the Sachsenhausen concentration camp which continued to operate until the end of the Nazi regime; 200,000 people were interned in Sachsenhausen over the 9 years the camp was operational under the Nazis. 22,000 were murdered by the Nazis before the liberation of the camp by the Soviet Red Army in 1945. Following this the site was reopened in August 1945 as Soviet Special Camp 7. A further 12,000 people (mostly Nazis not awaiting trial) died under the Soviets before the Special Camp was closed in 1950. Their remains were not discovered until the 1990s.