I went searching but came up empty. That is why I posed the question of speculation as to which works might have been included. If you find something, would you be so kind as to post it to this thread and ping me? Thank you!
The works range from the 4th to the 20th centuries, and include masterpieces from the Louvre and the Centre Pompidou in Paris, the Thyssen-Bonemisza Museum in Madrid, the Capilla Real in Granada, the Tret'jakov Gallery in Moscow, the National Galleries in Berlin, Budapest and Warsaw, St. Marc's Basilica in Venice and the Vatican Museums themselves.Among the artists on display are El Greco, Salvador Dali and Giorgio de Chirico. Another of the exhibits includes Byzantine and Russian icons, including one of the vision of the Apocalypse from the Monastery of St. John the Theologian in Patmos, the Greek island where St. John wrote the last book of the Bible.
Nothing I can see at the the Vatican Museum website.
The Telegraph says that good Lutheran "Albrecht Dürer’s The Opening of the Sixth Seal is among the works on show at the Vatican."
Hey, it's a start.