June 13 is the feast day of Saint Felicula, patron saint of vampire cats.
In the year 90 an angry Roman official had Felicula arrested and thrown into a sewer. Her little pet kitten Quincunx was also nabbed and was tossed right in after her. Felicula, despite having two broken legs and a concussion, miraculously managed to survive for over 90 days in the foul conditions by biting herself and drinking her own blood.
After Felicula died her remains were collected from the Roman sewer by St. Nicomedes, patron saint of hip waders.
Nicomedes also rescued Quincunx the cat who grew some seriously long, sharp fangs and went on to live for another nine hundred years.