The Vatican won't allow those making Dan Brown's "Angels & Demons" into a film, access to the various Roman churches where the novel is set.
Good for them. Let the filmmakers spend the extra $$ to create false sets or do creative CGI at the nearest church that does let them in. Or not. Who will notice or care? As long as the story is good, and the evil patriarchal oppressor is castigated, does any kind of truth matter?
And, I suppose, the filmmakers could even use this to their advantage, and portray themselves as victims of a nervous Vatican, fearful of the truth.