 On 16 November 1937, Georg Donatus, Cecilie, their two young sons, Georg's mother Grand Duchess Eleonore, the children's nurse, a family friend, a pilot and two crewmen, flew from Darmstadt bound for the United Kingdom, where Prince Louis was due to be married.The aeroplane hit a factory chimney near Ostend and crashed into flames, killing all those on board.Cecilie was heavily pregnant with her fourth child at the time of the crash, and the remains of the newborn baby were found in the wreckage, indicating that Cecilie had gone into labour during the flight; the Belgian inquiry into the crash suggested that the pilot was attempting to land in Ostend despite the poor weather conditions because of the birth.