In 1987, the Paris Opera Ballet School left the Palais Garnier, where it had been located since 1876, to move to a new building in Nanterre designed and built by the architect Christian de Portzamparc. In 2017, on the occasion of the 30th anniversary of this place of art in movement, Élisabeth Platel, director of the School, discusses Claude Bessy's influence on the soul of the building which accompanies the students throughout their studies. Élisabeth Platel also talks about a second anniversary, that of the 40th anniversary of the "Demonstrations". A unique public event inaugurated in 1977 and an important moment in the life of the School, presented each year on the stage of the Palais Garnier it highlights the breadth and depth of dance studies at the Paris Opera.