Christian Birkenstock was one of the three brothers who helped to make the brand a success (left). Stars like Kendall Jenner (right) have been seen wearing the label.

A film-maker with an eye for fashion intrigue would do well to make the “House of Birkenstock”. Thankfully, there would be fewer murders than in the Gucci original – but, over the past two decades, the scions of the German footwear brand have bought enough fast cars, Mediterranean estates and Manhattan penthouse apartments to give any Italian dynasty a run for their money. And if you’re looking for an acrimonious divorce to add some colour, they’ve got one of those too.