As part of the European Heritage Days and at the same time as its Festival, Le Monde is exceptionally opening its new building to visitors. One-hour visits, in small groups and led by a surprise representative of the newspaper, to discover the amazing headquarters of the Le Monde group, imagined by the international architectural agency Snohetta above the tracks of the Austerlitz station. This high environmental quality building (HQE), whose facade consists of 20,000 glass panels, follows the theme of this 39th edition of the European Heritage Days: sustainable heritage.