I guess the fireworks Zadok mentioned were the only pyrotechnic observance of the Lateran Pacts… other than the very fine lunch we had today (being a house run by the Holy See).
In the meantime, here is a nice photo of the mosaics in S. Maria in Domnica which I visited tonight with a very good friend.
And then a detail from the mosaic.
Fireworks in the vault of a Roman church if not in the Roman heavens.
However, here is one from last year: