Patricia Nilsson Jan 7, 2024 – 5.00am Save Share Porsche’s 75th anniversary extravaganza last northern summer included a frenzy of sports cars whizzing around its Stuttgart headquarters in front of an audience including heirs to co-founders Ferdinand Porsche and Anton Piëch. But although the marque’s first car was produced in 1948, the company that made it was formed 17 years earlier and had a third co-founder, Adolf Rosenberger, who gave up his role and stake before fleeing Nazi Germany and remains largely absent from the famed brand’s corporate history. “My family is not unique,” says Rosenberger’s second cousin Sandra Esslinger,...