 Later medieval legends increased the number of Gereon's companions to 290 or 319, and Saint Norbert of Xanten is said to have discovered, through a vision, the spot at Cologne where the relics of Saint Ursula and her companions, of Saint Gereon, and of other martyrs lay hidden.Gereon became a popular military saint and is often represented in art as a Roman soldier or medieval knight.Along with other saints who were beheaded, he is invoked by those suffering from migraine headaches.