Perhaps you are wondering how a collection is built? How is the choice made to bring a particular work into the museum? To mark the twentieth anniversary of the launch of its collections, the Musée du Quai Branly is trying to respond to them and is for the first time immersing itself in the threads and outlines of an acquisition policy through an exhibition that reveals the behind-the-scenes. Through 500 works, the exhibition questions the very essence of a museum: why acquire works and to whom should they be shown? What direction should we give it? What should be its role in the landscape of national collections? Through the eyes of a dozen curators and professionals in the museum world, these are the questions raised by the "20 Years" exhibition. Since 1998 - the date of creation of the Établissement public du musée du quai Branly, more than 72,000 historical and contemporary items (objects and graphic and photographic works) have been included in the public collections. These include major works, pieces that complete a whole or are historically significant. Carefully selected acquisitions, completing a heritage of nearly four centuries, merge the collections of the Musée de l'Homme and the Musée national des Arts d'Afrique et d'Océanie (MNAAO), as promises of new perspectives and renewed knowledge for non-European collections. The Quai Branly Museum was designed and created by Jacques Chirac who needed to exchange with cultures. In homage to the latter, the Musée du Quai Branly opens its doors free of charge until 11 October 2019 inclusive.