The German heavy tank destroyer Panzerjäger Tiger (P) (Sd.Kfz. 184) Ferdinand was based on the chassis of the Tiger (P) tank designed by Ferdinand Porsche. The vehicle was not accepted by army, but because 90 chassis have already been produced at the Nibelungenwerke plant, it was decided that they could be usefully developed. This is how the tank destroyer based on the Tiger (P) chassis was born.