Schloss Hartheim

Alkoven, Austria

Open to visitors

The interior is normally open, possibly ticketed.

Strollie cannot guarantee access — always check before you travel.

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Schloss Hartheim, a Renaissance castle near Linz in Upper Austria, was built by Jakob von Aspen in 1600 and stands as a prominent example of the period's architectural style. Located at Alkoven, approximately 14 kilometres from Linz, the castle is now a museum and listed heritage site. The building's historical significance extends beyond its architectural merit: during World War II, it became one of the centers for Aktion T4, the Nazi program targeting mentally and physically disabled German citizens for systematic murder by poison gas. After the program's official end in August 1941, the facility continued operations under "Action 14f13," serving as the Hartheim killing centre where approximately 30,000 Jews, communists, and concentration camp prisoners were murdered. Today it functions as a memorial to these victims.