The spooky moment, believed by some, to be a sign from God, was caught on camera by AFP photographer Filippo Monteforte.
Today he described how he took the incredible image which has been beamed all over the world.
He said: "I took the picture from St. Peter’s Square while sheltered by the columns. It was icy cold and raining sheets. When the storm started, I thought that lightning might strike the rod, so I decided it was worth seeing whether – if it DID strike – I could get the shot at exactly the right moment.”
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