Obscure Facts
Anne Frank's Father Otto Was the Only Member of the Secret Annex to Survive -- and Lived Another 45 Years
Otto Frank, the sole survivor of the eight people in hiding in the Secret Annex at Prinsengracht 263 in Amsterdam, survived not only the camps but also the post-war years. He dedicated the rest of his life -- 45 years -- to preserving Anne's memory and responding to the millions of letters he received from readers of her diary. He died in 1980 at the age of 91, having outlived his wife Edith, his daughters Margot and Anne, and virtually everyone he knew in Amsterdam before the war.
Source: WW2 Trivia Research