n the spring, he moved to Paris, 14, rue Campagne-Première.
April: his first pilgrimage to the Saint Rita Monastery in Cascia in Italy.
April 26: at 11 PM, in the presence of Iris Clert, Yves Klein and the lighting director of the City of Paris experimentally lit up the Obelisk of Place de la Concorde in blue. Klein’s objective was to complete the inauguration of his upcoming show at Iris Clert’s, scheduled to open two days later, by illuminating the monument. Permission was ultimately refused by the Prefect
April 28: opening of the exhibition La spécialisation de la sensibilité à l’état matière première en sensibilité picturale stabilisée, Le Vide (The Specialization of Sensibility in the Raw Material State into Stabilized Pictorial Sensibility, The Void) — the pneumatic period — at Iris Clert gallery.