"He had confessed that he was a little superstitious, but it was to calm down with the number 3, and "the multiple numbers of 3, 6, 9, 12." He died on October 3, after six years of marriage, the year of his thirty years! He had three children, and the ring he had offered to Caroline had three sapphires, one yellow, a green and a blue!"
January 1, 1970
https://en.wikiquote.org/wiki/Stefano_Casiraghi