Cristiana Brandolini d’Adda, the last surviving sibling of the Agnelli family and a notable heiress connected to the Fiat automotive empire, passed away on June 23, 2026, at the age of 99. Born in Turin in 1927, she was the fifth of seven children of Edoardo Agnelli, who died tragically in 1935 when Cristiana was just eight years old.

The Agnelli family, founded by Giovanni Agnelli, who established Fiat in 1899, experienced significant personal upheaval during Cristiana’s early years. After her father’s death—caused by a seaplane propeller accident—the family was marked by her mother Virginia Bourbon del Monte’s controversial relationship with the writer Curzio Malaparte, which strained ties with Giovanni Agnelli. During World War II, Cristiana and her siblings were separated for safety, with Cristiana spending time in Switzerland with her sister Susanna, who later became Italy’s first female foreign minister. In 1945, her mother died in a car accident involving a U.S. army vehicle, followed by the death of her grandfather shortly thereafter.

By 1946, Cristiana was studying art in Rome. She met her future husband, Brandolino Brandolini d’Adda, Count of Valmareno, in the ski resort Cortina d’Ampezzo. The Brandolini d’Adda family traces its noble origins to medieval times, with one ancestor ennobled by the Venetian Republic in the 15th century. The couple married quietly in Rome at the basilica of St Bartholomew on the Tiber Island during a politically turbulent period marked by the rise of communism. They settled on a large estate at Vistorta near Pordenone in Friuli and had four sons, all of whom survive her. Among them, Tiberto held leadership roles within the Agnelli family’s holding company, Exor, while other sons pursued careers in publishing, banking, and viticulture.

Cristiana played an influential role in the design and decoration of her family properties, working with notable figures such as interior designer Renzo Mongiardino and garden designer Russell Page. Their home at Vistorta became a showcase of original artistic and architectural elements, blending country-house charm with sophisticated visual techniques. Mongiardino’s work there helped elevate him to prominence among wealthy patrons internationally. The family also maintained residences in Paris and Venice, including the Palazzo Giustinian Brandolini on the Grand Canal, known for its hidden garden and historical significance.

After being widowed in 2005, Cristiana made the Venetian palazzo her primary residence. She was known for her refined taste and connections to the fashion world, counting designers like Oscar de la Renta among her circle. She herself earned a place on the International Best Dressed Hall of Fame in 1975, reflecting her personal style and social standing.

Cristiana held about six percent of Exor, a company with holdings valued at approximately £35 billion, including Ferrari, Juventus football club, Christian Louboutin, and The Economist. She provided steadfast support to her brother Gianni Agnelli during his tenure at the helm of Fiat and later backed her great-nephew John Elkann in navigating complex family inheritance disputes.

Despite the family’s public profile and internal challenges, Cristiana was remembered as pragmatic and loyal, with a sharp intellect noted by those close to her. Her granddaughter described her as the smartest person in the family, while Cristiana herself remained humble, emphasizing her commitment to her husband and family above all else.

Cristiana Brandolini d’Adda’s life spanned nearly a century marked by privilege, tragedy, and resilience, and she remained a respected figure in one of Italy’s most prominent dynasties until her passing.