Art history would be thoroughly revised. Michelangelo's Sistine ceiling, "David" and "Pieta"? Gone. Leonardo da Vinci's "Last Supper"? Never painted. Bernini's "St. Teresa in Ecstasy"? Never sculpted. Westminster Abbey? St. Paul's Cathedral? The cathedrals of Chartres, Salisbury and Notre Dame? Norway's stave churches? St. Basil's Cathedral? Istanbul's Hagia Sophia? The Byzantine mosaics at Ravenna? All gone. Makoto Fujimura's "The Four Holy Gospels"? Many of the works of Albrecht Dürer? Invisible. Rio de Janeiro's statue of "Christ the Redeemer"? Vanished.
I think this list of Dr. Peterson's inadvertently left off Edvard Munch's painting, The Scream.