The National Museum of Natural History is a Neo-Classical building on the Mall in our nation’s capitol. The Rotunda has featured a wooly Mastodon since the 1950’s and this exhibit while loved, was in very poor condition even in the 1980’s. This concept study was executed as a potential replacement of the old beast. The Rainforest exhibit was designed to modernize the statement made at the entry Rotunda to depict a more relevant statement about the Natural History challenges in the modern world. The base of the structure is comprised of a heavy poured glass matrix with a thin layer of organic soil cover. This simulates the very thin organic soil layer in many of the world’s rainforests. Laser cut Stainless Steel ribs capture glass shingles captured at the sides. The rotunda has a eclectic mix of classical architectural styles that become more complex as the structure rises roughly 80’ to the dome. Five pairs of Composite Order Columns support an Ovoid ring that serves to support the finely crafted structural frame of the conservatory. Mechanical elements are concealed in the dome roof. Water jet cut leaves from prehistoric plants adorn the colored glass structure.