Ten years after Charlemagne’s death in 814, a monk named Wetti, who was himself dying, experienced a religious vision. He related what he had seen to his fellow monks, one of whom composed a prose work called the ‘Vision of Wetti’ in 824. According to these accounts, Wetti had seen individuals undergoing purgatorial punishment for the sins that they had committed while alive. Though no names were used, the first letters of each line, when put together, spell out a name and a title: Carolus imperator, Charles the emperor, which is to say, Charlemagne.