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Prince Charles and Diana, Princess of Wales (1961 - 1997) visit the Helen Mayo refectory at Adelaide University, Adelaide, Australia, 5th April 1983. Diana is wearing a black and white suit by Jan Van Velden. (Photo by Jayne Fincher/Princess Diana Archive/Getty Images)

Prince Charles and Diana, Princess of Wales (1961 - 1997) visit the Helen Mayo refectory at Adelaide University, Adelaide, Australia, 5th April 1983. Diana is wearing a black and white suit by Jan Van Velden.  (Photo by Jayne Fincher/Princess Diana Archive/Getty Images)