Garavani founded the luxury fashion house Valentino in Rome in 1960, establishing it as a leading 'maison de haute couture'.
He was renowned for dressing iconic figures such as Jacqueline Kennedy, Audrey Hepburn, and Julia Roberts, and for his signature 'Valentino red'.
Tributes have poured in from around the world, including from Italian Prime Minister Giorgia Meloni and actress Gwyneth Paltrow, honouring his legacy as a master of style and elegance.
Garavani retired from design in 2008, with his career and life captured in the documentary Valentino: The Last Emperor, and will lie in state before a funeral on Friday, 23 January.