Cusco is supported by more than 3000 years of age to be considered as The Oldest Existing City of America. Cusco, and its cultural and geographical diversity, has suffered and enjoyed different events through the years that have turned it into a historical study center and the most important tourist core of the country. There are different opinions with regard to the first inhabitants of the city. Some persons state that the Marcavalle town or the Sawasiras, Antasayas and Wallas tribes initially inhabited the valley. Others base their theories on the Inca mythology, according to which Manko Qhapaq and Pachakuteq founded the city. None of this theories has been proved, but there is a great amount of pre-ceramic samples that support the antiquity title assigned to the city.