A French legend that sprang up around the name of St. Romanus ("Romain") (AD 631–641), the former chancellor of the Merovingian king Clotaire II who was made bishop of Rouen, relates how he delivered the country around Rouen from a monster called Gargouille or Goji. La Gargouille is said to have been the typical dragon with batlike wings, a long neck, and the ability to breathe fire from its mouth. There are multiple versions of the story, either that St. Romanus subdued the creature with a crucifix, or he captured the creature with the help of the only volunteer, a condemned man. In each, the monster is lead back to Rouen and burned, but its head and neck would not, due to being tempered by its own fire breath. The head was then mounted on the walls of the newly built church to scare off evil spirits, and used for protection. In commemoration of St. Romain the Archbishops of Rouen were granted the right to set a prisoner free on the day that the reliquary of the saint was carried in procession.
From the story of Adam and Eve, the serpent represents a struggle between good and evil. The serpent was related to the deadly sin 'envy'. They were also thought to be immortal due to the shedding of their skin. This gave rise to the symbol for immortality being the Ouroboros, a serpent with a tail in its mouth.
The goat had two viewpoints in medieval times. One perspective was that the goat was equated with Christ due to its ability to climb steep slopes and find edible food. On the other side it was seen as a symbol for lust and even linked to Satan.