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Town hall in 1989
|• Mayor||Mirko Heuer (CDU)|
|• Total||71.99 km2 (27.80 sq mi)|
|Elevation||51 m (167 ft)|
|• Density||750/km2 (2,000/sq mi)|
|Time zone||CET/CEST (UTC+1/+2)|
From 1866 to 1868 Robert Koch worked in Langenhagen.
On August 17, 1982, the world's first mass production of Compact Discs began in Langenhagen.
The Langenhagen standard (German: Langenhagener Norm), declared 1990 and sponsored by Brenneke is an industry standard for the minimal precision of shotguns and combination guns fit for hunting with shotgun slugs.
In 2001 the city council was elected for five years. The Christian Democrats and the Social Democrats won the election (both parties send 19 councilors to the council). The two "small" parties FDP (Free Democratic Party) and Bündnis 90/Die Grünen (Greens) received two seats each. Dr. Susanne Schott-Lemmer (CDU) is the mayor of Langenhagen. She won against the candidate of the Social Democrats with more than 60 percent.
On 10 September 2006 the city council was elected for five years. The Social Democrats won the election (send 19 councilors to the council). The FDP (Free Democratic Party) got two seats and Bündnis 90/Die Grünen (Greens) received four seats each. The Christian Democrats lost with only 16 seats. Dr. Susanne Schott-Lemmer (CDU) was not elected and is the loser of the elections. The new mayor of Langenhagen is Friedhelm Fischer from the Social Democrats with more than 52 percent.
Langenhagen is twinned with: