The Gothic Cathedral of Saint Antolín in Palencia is sometimes known as “the unknown beauty.” It is the third-largest in Spain and also the one with the longest central nave. The cathedral’s exterior is lined with a number of striking gargoyles. Among the skeletons and mythical beasts, there is one that seems to be out of place: A curious character in a buttoned cassock juts out from one of the cornices, wearing a camera around his neck. The story of the photographer gargoyle begins in 1755, when a powerful earthquake…