She is reconstructing an ancient wall, in Caral, It is attributed an antiquity of 5,000 years and it is considered the oldest city in the Americas and one of the oldest in the world. No other site has been found with such a diversity of monumental buildings or different ceremonial and administrative functions in the Americas as early as Caral. Caral is the largest recorded site in the Andean region, with dates older than 2000 BC. It appears to be the model for the urban design adopted by Andean civilizations that rose and fell over the span of four millennia. Scholars believe that research conducted in Caral may answer questions about the origins of the Andean civilizations and the development of its first cities.It has been declared a Humanity Cultural Heritage site by UNESCO. Wikipedia