About École Normale Supérieure:
The École normale supérieure (also known as Normale sup', Ulm, ENS Paris, l'École and most often just as ENS) is one of the most selective and prestigious French grandes écoles (higher education establishment outside the framework of the public university system) and a constituent college of Université PSL.
Founded in 1794 and reorganised by Napoleon, ENS has two main sections (literary and scientific) and a competitive selection process consisting of written and oral examinations. During their studies, ENS students hold the status of paid civil servants.
The principal goal of ENS is the training of professors, researchers and public administrators. The vast majority of the academic staff hosted at ENS belong to external academic institutions such as the CNRS, the EHESS and the University of Paris. This mechanism for constant scientific turnover allows ENS to benefit from a continuous stream of researchers in all fields. ENS full professorships are rare and competitive. Generalistic in its recruitment and organisation, the ENS is the only grande école in France to have departments of research in all the natural, social, and human sciences.