Updated: Apr 28, 2018
Portrait of Anne Frank at age 12, sitting at her desk at the Montessori school in Amsterdam. (Courtesy Anne Frank House, Amsterdam)
The historian told NPR in 2007 that the documents suggest "Anne Frank could be a 77-year-old woman living in Boston today – a writer." Instead, she died at the age of 15 at Bergen-Belsen concentration camp in Germany.