The École normale supérieure de Lyon (also known as ENS Lyon, ENSL or Normale Sup' Lyon) is a highly selective grande école located in Lyon, France. As one of France's four Écoles normales supérieures, ENS Lyon is associated with a strong French tradition of excellence and public service. It trains researchers and teachers in the sciences and the humanities. It is considered as one of the three most prestigious and best French universities along with its sister the École Normale Supérieure located in Paris and the École Polytechnique, and is ranked as the 100th in the world.