 The Gallery of Comparative Anatomy (occupying the ground floor), holds nearly a thousand skeletons and interprets their organization and classification.The Gallery of Paleontology (occupying the first and second floor) presents a famous collection of fossil vertebrates, fossil invertebrates and fossil plants.Among the most appreciated pieces by the public is worth mentioning a series of dinosaur skeleton casts ("Diplodocus", "Iguanodon", "Allosaurus", "Carnotaurus", "Tarbosaurus", "Unenlagia", "Dromaeosaurus", "Bambiraptor") but also a "Tyrannosaurus" skull (cast of specimen AMNH 5027), an authentic skull of "Triceratops", an authentic "Compsognathus" skeleton, and some authentic fossilised skeletons of other extinct animals like "Sarcosuchus", "Cynthiacetus", "Mammuthus meridionalis", "Mammuthus primigenius", "Megatherium", "Thalassocnus", "Ursus spelaeus", "Panthera leo spelaea", "Aepyornis" and many others.