International Holocaust Remembrance Day is observed on January 27 in memory of the day in 1945 when the Auschwitz concentration camp was liberated, to commemorate the persecution, genocide and killing of six million Jews and all other Nazi regime victims.
After Mirogoj, the president and Lustig, a famed film producer who survived the horrors of the Nazi death camps, watched Hans Krasa's children's opera "Brundibar".
The opera was first performed during WWII by the children of Theresienstadt concentration camp in occupied Czechoslovakia. A special performance was staged for the Red Cross to show that life in the camp was "normal". A Nazi propaganda film was later made of the opera, after which all performers, musicians and authors were deported to Auschwitz, where they were killed.