Hall of Extinct Monsters, National Museum of Natural History, 1930s, by Unknown, c. 1930, Smithsonian Archives - History Div, View of the Vertebrate Paleontology Hall, also known as Dinosaur Hall, in the United States National Museum's (USNM) Natural History Building (NHB), now the National Museum of Natural History (NMNH). At the time of this picture the exhibit of fossil animals was called the "Hall of Extinct Monsters". Several dinosaur skeletons and other fossil animals are on exhibit and a mural of "Diana of the Tides" can be seen on the rear wall..