Complex sentence: Les Champs Libres is a building on Esplanade Charles de Gaulle designed by the architect Christian de Portzamparc that houses the Brittany Museum (Musée de Bretagne), regional library Bibliothèque de Rennes Métropole on six levels and an Espace des Sciences science centre with a planetarium.
Split into simpler sentences: Les Champs Libres is a building on Esplanade Charles de Gaulle, and was designed by the architect Christian de Portzamparc. It houses the Brittany Museum (Musée de Bretagne), the regional library Bibliothèque de Rennes Métropole with six floors, and the Espace des Sciences science centre with a planetarium.