Service Building, 1935, Jardin des Plantes, Museum National d'Histoire Naturelle, Paris, France. Detail of concrete tree trunks outside the entrance to the building which were  originally made for the Tropical Rainforest Glasshouse (formerly Le Jardin d'Hiver or Winter Gardens), 1936, Ren&eacute; Berger. Skilled craftsmen specialised in this type of work during the 1930s.