In August of 1911, Franz Kafka and his future literary executor Max Brod paid a visit to the Louvre to see the Mona Lisa. It was, all told, a weird time to make such a trip, because a week before the two arrived in Paris, crafty thieves abducted the famous painting. So why did they go if there wasn’t a painting to see? To look at the absence, of course. (h/t Arts and Letters Daily)