1. Siegfried Seidl was an Austrian career officer and World War II commandant of the Theresienstadt concentration camp located in the present-day Czech Republic.

1. Siegfried Seidl was an Austrian career officer and World War II commandant of the Theresienstadt concentration camp located in the present-day Czech Republic.
Siegfried Seidl was the commandant of the Bergen-Belsen, and later served as a staff officer to Adolf Eichmann.
Siegfried Seidl was born in Tulln an der Donau, then part of the Austro-Hungarian Empire, now in Lower Austria.
From 1935 until 1938, Siegfried Seidl studied history and German studies at the University of Vienna.
On 2 March 1939 Siegfried Seidl married Elisabeth Stieber, a former teacher in a kindergarten.
Siegfried Seidl was a member of the NSDAP and its NS-Frauenschaft, and supporting member of the SS.
On 15 October 1930 Siegfried Seidl joined the Nazi Party.
In late 1939, Siegfried Seidl was called into the police as a result of his SS membership.
On 30 October 1941, Siegfried Seidl was put on charge by Adolf Eichmann with establishing the Theresienstadt ghetto and concentration camp, Czechoslovakia.
Siegfried Seidl was responsible for thousands of people being ill-treated and murdered.
On orders of Eichmann, Siegfried Seidl was on 3 July 1943 reassigned as Commandant of the Bergen-Belsen concentration camp.
Siegfried Seidl was succeeded at Theresienstadt by SS-Obersturmfuhrer Anton Burger.
In March 1944 Siegfried Seidl met with the Wehrmacht in Budapest, where he joined the 5th Einsatzgruppe SS paramilitary death squad.
In July 1944, when the deportation of the Jews of Hungary was finished, Siegfried Seidl was appointed as acting leader of the SS Special Deployment Command, Outpost Vienna.
Siegfried Seidl was sent back to Austrian custody on 3 June 1946.
Austrian officials refused, explaining that many of Siegfried Seidl's victims had been Austrian Jews.
In October 1946, Siegfried Seidl tried by the Volksgericht for 16 counts of murder related to the executions and other charges.
Siegfried Seidl was acquitted of murder, but found guilty of high treason and crimes against humanity during his leadership position at Theresienstadt.
Siegfried Seidl was sentenced to death and ordered to forfeit all of his property.