This is one of the few television interviews Anne Frank's father Otto gave (1967). While sitting in the Secret Annex, he talks about his surprise at the things Anne wrote in her diary. Although he and Anne were very close, he wasn't aware of her most inner feelings. | Anne Frank House

#OnThisDay 1929: Anne Frank was born. In 1979, her father Otto explained to Blue Peter's Lesley Judd how his daughter's famous diary survived to become a best-seller. | BBC Archive