The King has offered condolences to the step-sister of Anne Frank and Holocaust survivor Eva Schloss, who passed away at the age of 96.
"My wife and I are deeply saddened to hear of the passing of Eva Schloss," stated King Charles in a message shared via social media.
He added, "The horrors that she experienced as a teenager are difficult to fathom and yet she devoted the remainder of her life to fighting hatred and prejudice, fostering kindness, courage, understanding and resilience."
Mrs Schloss was the co-founder and honorary president of the Anne Frank Trust, an organization where the Queen Consort serves as Patron.
In the 1940s, Mrs Schloss and her family were chased from their home in Austria. They lived as refugees in the Netherlands before being apprehended and sent to the infamous Auschwitz concentration camp.
The Anne Frank Trust said Mrs Schloss passed away in London on 3 January. "As a girl, Eva Schloss-Geiringer resided in Amsterdam, near Anne Frank's home," the trust noted.
When Mrs Schloss and her mother were freed by the Soviet army in January 1945, they were barely alive. Her brother and father both perished in captivity.
After being repatriated to Amsterdam, her mother Elfriede—known as Fritzi—wed Otto Frank, the father of Anne Frank, who had also survived internment by the Nazis.
Over the past four decades, Mrs Schloss devoted her efforts to trying to prevent history from happening again.
"I worked very, very hard to change people's attitudes," Mrs Schloss remarked in an interview. "Each person you convince not to be racist is a step forward."
In 1951, Mrs Schloss moved to London to learn photography. There she met her husband, Zvi Schloss, a German Jew who had fled to Palestine during the war.
The couple settled in London and became UK citizens. Mr Schloss passed away in London in 2016. They are survived by their daughters, sons-in-law and grandchildren.