In the seventies and eighties he worked closely with the Swiss philosopher Denis de Rougemont as a counsellor of the Centre Européen de la Culture.
Saint-Denis | Denis Diderot | Saint-Ouen, Seine-Saint-Denis | Denis Leary | Denis | Seine-Saint-Denis | Claire Denis | Montreuil, Seine-Saint-Denis | Denis Halliday | Rougemont | Denis Healey | Charles Denis Bourbaki | Ruth St. Denis | Maurice Denis | Denis Thatcher | Denis Sassou Nguesso | Denis McLoughlin | Siméon Denis Poisson | Saint-Denis, Réunion | Gare d'Estrées-Saint-Denis | Denis Smith | Denis Piel | Denis Lawson | Denis Johnson | Denis Boyles | Basilica of St Denis | Villepinte, Seine-Saint-Denis | Saint Denis Street | Saint-Denis, Quebec | Saint-Denis-lès-Martel |
The project was criticized by Denis de Rougemont and Duncan Sandys, son-in-law of Winston Churchill, founder of the European Movement, who advocated a model based on an intergovernmental co-operation without any loss of national sovereignty.