I hope the Pope enjoys himself when there is a giant Mosque in St. Peters Square
I don't recall the Vatican saying anything about the extremist muslims (Palis) pissing in the Church of the Nativity, either.
You should have said, "I hope the Pope enjoys himself when St. Peters is a giant mosque, like St Sophias in Istanbul."
You can be sure they'll change the art work.
The Pope should especially enjoy their call to prayer...several times a day.