Ottensen (old name: Ottenhusen) located in Hamburg, Germany in the Altona borough on the right bank of the Elbe river, is a former town. It is a now one of the 104 quarters of Hamburg.
The first record of Ottensen dates from 1310. In 1390, it became the seat of the bailiff of the county of Holstein-Pinneberg. The settlement was mostly composed of farmers and craftsmen. During the 1640s, it surpassed nearby Altona in size. It was annexed to Prussia in 1867, and the population rose rapidly: from 2,411 in 1840 to 37,738 in 1900.
It was later annexed to the city Altona, which in turn was due to the Greater Hamburg Act annexed to Hamburg in 1937.
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