Unlike most of Pelli’s work in supertowers, his creation of the National Museum of Art in Osaka, Japan is a very different and unique architectural masterpiece done by Pelli. The construction actually began three levels underground, based on strict geometry that is expressed in the form and silhouette of the towers. The museum presents an explosive, amorphous facade, completely free of geometric constraints of any kind. The museum was mainly dedicated to holding contemporary art collections to attract the public and tourists from other countries. The limitations of the area were the main cause of why the museum had to be built underground at the start. The area is crisscrossed by several underground streams, calling for triple-layered concrete walls reaching 3 meters in thickness. This smart architecture allows for protection against earthquakes and general moisture that forms underground.