Dominique Perrault is an architect and urban planner, an engaged actor in contemporary architecture. Professor at the Ecole polytechnique de Lausanne, lecturer and member of the Academie des Beaux Arts since 2015, he has many large-scale projects to his credit that have established his international reputation. Architect of the Bibliotheque nationale de France, the Velodrome and the Olympic swimming pool in Berlin, and the extension of the European Court of Justice in Luxembourg, he recently renovated the Dufour Pavilion at the Chateau de Versailles. Philippe Belaval is a French senior official, president of the Centre des monuments nationaux since 2012. Holder of a master's in public law, a graduate of the Institut d'etudes politiques de Toulouse, alumnus of the Institut des hautes etudes de defense nationale and general director of the Opera de Paris, he has been a member of the Conseil d'Etat since 1979.