The Ottensen Mausoleum is a private mausoleum in the Ottensen district of Lindhorst. The mausoleum was built in 1952 by the Jewish brickworks owner Oskar Philippsohn, a survivor of Theresienstadt, near his home for himself and his family using bricks from his own production. His Protestant wife Karoline Philippsohn, née Wenthe, was buried here in 1960, and her brother Wilhelm Wenthe in 1963. In 1964, the brickworks, which Oskar Philippsohn's grandson had taken over, went bankrupt. In addition to other property, the house with the mausoleum on the property had to be sold.