Allosaurus Arrives on the Mall In April 1987 a one-ton fiberglass Allosaurus sculpture was moved into the <a href="http://mallhistory.org/items/show/55">National Museum of Natural History</a>. <span> A crowd formed on the Mall at the steps of the museum to watch the dinosaur lifted into the building with a winch. </span>The 20-foot-long model was featured in the "Dinosaurs, Past and Present," a temporary exhibit displaying artistic representations of dinosaurs constructed in the 1800 and 1900s. After three months, the Allosaurus and other works traveled to museums across North America. Smithsonian Institution Archives. <a href="http://siarchives.si.edu/collections/siris_sic_5712?back=%2Fsearch%2Fsia_search_collections%2Fdinosaur">View Original</a>. 04/28/1987 (Allosaurus Arrival) 06/04/1987 ( "Dinosaurs, Past and Present" Opens) 08/31/1987 ( "Dinosaurs, Past and Present" Closes) <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=38&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=1980-1999">1980-1999</a>