What do you mean, stole them from whom? Who made that land they own? Do you really think it's right for one person to own vast tracts of land, much of which she never visits, or great works of art that we are not allowed to see, or, at best, have to pay to see? Who was that great art made for? For the world's richest woman to hold as "investments"?
Yes yes, there there, Steve!: we all know that Property Is Theft, as Marx didn't say {it was Proudhon IIRC}.
So did you "steal" YOUR house? YOUR watch? YOUR car? YOUR ties and shirts and trousers? then, eh?