|Town subdivisions||9 districts|
|Mayor||Hans-Joachim Laesicke (SPD)|
|Area||162.37 km2 (62.69 sq mi)|
|Elevation||34 m (112 ft)|
|Population||41,966 (31 December 2011)|
|- Density||258 /km2 (669 /sq mi)|
|Time zone||CET/CEST (UTC+1/+2)|
Division of the town 
Oranienburg consists of 9 districts
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.
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.
Oranienburg was also the center of Nazi Germany's nuclear energy project and according to military historian Antony Beevor, the launching of the Battle for Berlin by Stalin was motivated by his desire to acquire that facility. It has also been claimed that the preemptive destruction of these facilities by the USAAF Eighth Air Force on March 15, 1945, was done so as to prevent it from falling into Soviet hands.
International relations 
Oranienburg is twinned with:
- Bagnolet (France) -- since 1964
- Hamm (North Rhine-Westphalia, Germany) -- since 1990
- Mělník (Czech Republic) -- since 1974
- Vught (Netherlands) -- since 2000
- Friedrichsthal (Saarland, Germany) -- since 1991
Public institutions 
See also 
- "Bevölkerung im Land Brandenburg am 31. Dezember 2011 nach amtsfreien Gemeinden, Ämtern und Gemeinden. Gebietsstand: 31.12.2011". Amt für Statistik Berlin-Brandenburg (in German). 31 December 2011.
- Antony Beevor Berlin: The Downfall 1945, Penguin Books, 2002, ISBN 0-670-88695-5 Preface xxxiv
- Richard G. Davis,Bombing the European Axis Powers. A Historical Digest of the Combined Bomber Offensive 1939–1945 Alabama: Air University Press, 2006, page 518
Media related to Oranienburg at Wikimedia Commons
- Official site (German)