The Teenage Mutant Ninja Turtles (often shortened to TMNT or Ninja Turtles) are four fictional teenage anthropomorphicturtles who are named after four Renaissance Italian artists. They were trained by their anthropomorphic ratsensei in the art of ninjutsu. From their home in sewers of New York City, they battle petty criminals, evil overlords, mutated animals, and alien invaders while attempting to remain hidden from society. They were created by Kevin Eastman and Peter Laird.