In 1948, he became rabbi of Les Tournelles, the Great Synagogue in Paris. In the Cercle d'Etudes du Marais he formed at 14 Place des Vosges, in the heart of Le Marais, the lecturers included: Raymond Aron, Robert Aron, Henri Baruk, le Père Marie-Benoît, Jean Cassou, Georges Duhamel, Marcel Dunan, Edmond Fleg, Henri Hertz, Louis Kahn, Joseph Kessel, Jacques Madaule, Arnold Mandel, Szolem Mandelbrojt, François Mauriac, Edmond Michelet, Pierre Morhange, François Perroux, le Père Michel Riquet, Pierre-Maxime Schuhl, André Spire, Jean Wahl, and many others.