British royals, the Duke and Duchess of Cambridge, on Saturday spent around 45 minutes admiring the Taj Mahal and also sat on the ‘Diana seat’ for a photo session - evoking the memory of the late Princess of Wales, who had sat on that marble bench alone 24 years ago, triggering rumours about the state of her marriage.Prince William and Kate Middleton pilgrimage to the Taj Mahal evoked memories of William's late mother, Princess Diana, who visited the same spot in 1992.