condition, as a contemporary report describes: "Doors, windows and ovens are entirely missing, ... and several ceilings must be replaced." In 1898, Camillo Henry, Prince of Starhemberg, made a present of the castle building, the outbuildings and some land to the Upper Austrian State Welfare Society (Oberösterreichischen Landeswohltätigkeitsverein or OÖ. LWV). It was intended to use further donation to convert the building into an "Idiot's Institute" as it was described at the time. In addition between 1900 and 1910 major renovation and conversion work was carried out to enable the building to be used as a care home for mentally handicapped people. In 1926, a staircase was dismantled and replaced by a bed lift. Nazi era and aftermath Following Hitler's so-called "euthanasia decree" of 1939, Hartheim was selected as one of six killing facilities in the Reich. Between May 1940 and December 1944, approximately 30,000 people physically and mentally disabled or ill were killed at Schloss Hartheim by gassing with Carbon monoxide as part of Action T4, a program of mass murder named after the Berlin address "Tiergartenstrasse 4". These included about twelve thousand prisoners from the Dachau and Mauthausen concentration camps who were sent here to be gassed, as were hundreds of women sent from Ravensbrück concentration camp in 1944, predominantly sufferers of TB and those deemed mentally infirm . The castle was regularly visited by the psychiatrists Karl Brandt, Professor of Psychiatry at Würzburg University, and Werner Heyde. In December 1944 Schloss Hartheim was closed as an extermination centre and restored as a sanatorium after being cleared of evidence of the crimes committed therein. In 1946, Alice Ricciardi-von Platen, a psychiatrist and psychoanalyst who practised near Linz, Austria, was invited to join the German team observing the so-called Doctors' trial in Nuremberg. The trial was presided over by American judges, who indicted Karl Brandt and 22 others. The 16 who were convicted included Josef Mengele; seven were sentenced to death. Her 1948 book, Die Tötung Geisteskranker in Deutschland, ("The killing of the mentally ill in Germany"), was judged a scandal by German medical professionals. After World War II, the building was converted into apartments. 1969, the first memorial rooms were opened in the former gas chamber and admission room. Since 2003 Hartheim Castle is a memorial site dedicated to the ten thousands of physically and mentally handicapped persons, concentration camp prisoners and forced laborers who were murdered there