After Agnelli obtained her diploma in Switzerland, she was educated in Paris, where she attended the
Académie des Beaux-Arts and then the
Académie Julian in Paris. As part of her varied career, which included photography, design, and art collection, as well as a modeling career, Agnelli began her photography career as an assistant to
Erwin Blumenfeld in
New York City, where she lived on
Park Avenue on the
Upper East Side. When she returned to Italy, Agnelli was also an occasional editor and photographic contributor to
Vogue and
Condé Nast, among other magazines. In 1973, she created a textile line for Abraham-Zumsteg, for which she was awarded the Resources Council's Roscoe (the design trade's equivalent of the Oscar) in 1977. This was followed by work for the Ratti in Como, Steiner factories in France, and for Martex and numerous others for
Marshall Field's in the United States. She specialized in furnishing fabrics. An avid gardener, Agnelli authored a number of books on the subject, also providing many of the photographs. Two of her books are about the Agnelli Gardens at
Villar Perosa, such as
The Agnelli Gardens at Villar Perosa: Two Centuries of a Family Retreat (1998), and the
Garden of Ninfa, such as
Il giardino di Ninfa (1999). Into the 21st century, she oversaw the opening of the
Renzo Piano-designed art gallery
Pinacoteca Giovanni e Marella Agnelli, built on the roof of the former
Lingotto Fiat factory in
Turin. The Agnelli collection includes
Picasso,
Renoir,
Canaletto,
Matisse, and
Canova masterpieces, and opened in 2002. The gallery also puts on temporary modern art exhibitions. She commissioned art from the likes of
Andy Warhol and
Richard Avedon. In 1970, Agnelli founded the National Commission of United World Colleges. She was a member of the International Board of Trustees of the
Salk Institute for Biological Studies in San Diego, California, and of the International Council of the
Museum of Modern Art in New York. Among others, she was also vice-president of the Council of
Palazzo Grassi in Venice, as well as president of I 200 del Fai in Milan and of the Association of Turin Friends of Contemporary Art in Turin. == The Swans ==