Pope Shelly, considering their holy dish will be of turtles.
Michelangelo, Leonardo, Donatello or Raphael are acceptable too.
Followers take a piece of cooked turtle meat that's been passed around in a turtle shell in remembrance of the 1st turtle.
Baptism in sewer water.
Pizza day on Fridays.
Its a merger of Rat & Turtle.
... I've over-thought long and hard about this.