![Hartheim castle, a euthanasia killing center where people with physical and mental disabilities were killed by gassing and lethal ... [LCID: 76511]](https://encyclopedia.ushmm.org/images/large/4ba0e5ae-4949-455b-9949-2bee812aa0e7.jpg)
Hartheim castle, a euthanasia killing center where people with physical and mental disabilities were killed by gassing and lethal injection. Hartheim, Austria, date uncertain.
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