A half-man, half-bird beast playing a flute. A cat’s head popping out of a snail shell. A woman barfing up a tiny demon. These are just some of the otherworldly critters that scribes in the Middle ...

Olivia Swarthout has brought medieval art to the masses (460K Twitter followers and counting) but she’s not formally trained in medieval history or art. A self-described “proprietress of weird ...