This cache is a cache commemorated to Lilly Ebert, who survived the holocaust with only a golden pendant that her parents gave her when she was a child.
She was 14 when her family were taken from their home in Hungary and taken to Auschwitz.
With the pendant in her shoe she and two of her sisters survived while her brother, mother and other sister did not.
She still wears the pendant today, the only ting remaining from her childhood.