Marella Agnelli, the 91-year-old wife of late Fiat Chairman Gianni Agnelli, died on Saturday at her home in Turin, the Agnelli family said in a statement.

Born in Florence to Neapolitan Prince Filippo Caracciolo, a diplomat, and Illinois heiress Margaret Clarke, Marella married the grandson of Fiat’s founder Giovanni Agnelli in 1953, Reuters reported.

The couple had two children, Edoardo and Margherita, mother of current Fiat Chrysler Chairman John Elkann.

A style icon, Marella was famous for her long and elegant neck, reminiscent of Modigliani’s women, which earned her the nickname The Swan and inspired famous portraits by photographer Richard Avedon.