Fashion jewellery/artist jewellery; it is impossible to prise them apart. Fashion designers work with artists – in the 1930s, Elsa Schiaparelli asked Alberto Giacometti and Salvador Dali to add to her clothes – or they simply borrow from artists, as the now-legendary Helmut Lang did, when he borrowed a shackle necklace by Louise Bourgeois, originally conceived in 1948, for his 2003 spring-summer show.

More recently, Maria Grazia Chiuri asked the now-nonagenarian Claude Lalanne, who had created a gold breastplate for a dress by Yves Saint Laurent in 1969, to add sculptural blooms dipped in gold to the spring 2017 Dior couture collection.