[aMorePerfectUnion]

That would apply to photos you took. Different if you use photos that are the property of others.

If you license their property, I do not see how it could be legal or that the Vatican has any say over legal usage.

[D-fendr]

If you license it, then you’d have to adhere to the terms of the license.

I have no idea about Italian law, but in the U.S., I would expect the Church would have the same rights under the same laws as anyone else.