The questionable Da Vinci painting that was recently "found" a few years back, Salvatore Mundi, has Christ holding a what appears to be a crystal ball in His left hand.
That was one of the reasons I felt it was a forgery. I don't know the significance of it- is it a globe, is it occultic? What does it represent? The crystal globe is completely clear- no reference to the earth in any way. I don't think even Da Vinci would put a crystal ball in Christ's hand. (At least I hope not)
As far as the globe in Rue de Bac, I never heard it referred to that way, but I would be very curious to know more.

No offense intended to Our Lord, but what an ugly picture! At first glance I thought it was an ugly woman. Why does He look like a manly woman or womanly man?!