Sechin Alto is a massive architectural complex in Peru belonging to the Early Formative period (2000-1500 BC).
The site was later studied by archaeologists es:Rosa Fung Pineda and Carlos Williams (1979), and by Thomas and Shelia Pozorski (1987).
It consists of raised embankments and walls with large stones alternating with smaller ones; conical adobe bricks are seen in the interior.
The whole of Sechin Alto complex covers the area of 300-400 hectares, or five times the size of Caral, one of the largest Archaic sites in Peru.
It is known for its high stone walls with reliefs depicting "warrior-priests" with their mutilated enemies; this architectural complex dates back to 1,500-2,000 BC.
"Preliminary data suggesting connections among Sechin Alto Complex sites, Pampa de las Llamas-Moxeke in the south branch, and certain coastal sites north of the Casma River mouth indicate that the greater Casma Valley area was unified during the early Initial Period by the Moxeke polity which existed during a time span defined here as the Moxeke Phase.