Lily (Prince William, who may become King Billy) kept his mother’s rosary. Princess Di was buried with one of her prized possessions (Blessed Mother Teresa’s rosary)
All makes for a great story - inter-racial / inter-faith tension. Life is never easy nor uncomplicated.
How could William keep his mother’s rosary if she was buried with it? Only one of the two things can be true.
I’m sure Mother Teresa gave rosaries to numerous people, all of whom have kept them as treasured possessions from a beloved woman who did a great deal of good for many people.
Whether that has impacted on the religious faith of any of them is highly doubtful. In the case of such a superficial and self-confessedly unintelligent woman as Princess Di the likelihood is much less than usual.
Certainly it didn’t stop her seeing her usual bevy of astrologers and clairvoyants and the like, so there’s no reason at all to believe that there was any present or potential sort of faith ‘tension’ of the kind, except in the minds of the media who were happy to play up the fact that her lovers were Muslim. See, for their to be interfaith tension there would have to be faith, and in her case there seems to have been none.
As for Prince William - if he did keep her rosary - there is no more motive apparent or necessary than that it belonged to his mother. If my mother owned a statue of the Buddha I would probably keep it for the simple fact that it belonged to her.
He certainly has given no indication of having even the sort of ill-defined ‘spirituality’ that his father has at times shown. Not that in Charles’ case it has translated into anything approaching actual faith, if his cavalier disregard of his marital vows is anything to go by.
There’s not a single one of the current crop of Windsors, the cousin who converted to Catholicism and the Queen possibly excepted, who ever have known or ever would know faith if it hit them over the head with a plank. A St Paul-style miracle aside. And even then, they being intellectual midgets compared to us let alone St Paul, it would probably achieve nothing in their case.