An honour? no. Interesting? Most definitely.
By the way, try to be on the news, as in : "make it exceptional". (nutshot, etc.)
I'll cheer for you from my sofa.
I'd be no more honored to meet the pope than I was at meeting Dr. Jonas Salk when I was a kid. I met him before I had any appreciation for what he did, so it was kind of a non-notable day.
I will agree with what was said above: architecture is cool. I see the Vatican City on TV all the time and think it would just be a really cool place to drive around. Pretend it's for some other use, like a public university or something.
I would enquire as to what the audience actually involved. I'd wager it's something quite impersonal and generic. As a matter of personal philosophy, I won't show deference or any sign of submission to any person, deity or idol without due reason. This means that I will not bow my head nor kneel before any authority that has not earned my respect. That rules out pretty much everything to do with religion, especially anything to do with the Pope.
If the audience required any such thing, I would decline and inform the appropriate teacher of my reservations well in advance. Sometimes that pisses people off and it results in a fight, but I always seem to win that fight in the end, so I'm cool with it.
If I am invited as a guest, I will generally either toe the line of the terms of the invitation (provided they are clear), or decline it civilly. That's my choice and my right. Keep in mind that your behavior during the audience will reflect on your teacher and also on her connection who provided this opportunity.
No idea, but they probably have mind scanners to make sure you don't ask legitimate questions lol