The Pernil Alto archaeological site is located in Rio Grande District of Palpa province in the Ica Region of Peru. Although the site was occupied earlier, archaeologists traced the adoption of agriculture by the inhabitants from about 3800 BCE to 3000 BCE (5800 to 5000 BP). The excavators cite radiocarbon dates which establish Pernil Alto as the oldest known inland and sedentary agricultural village in the Central Andes of Peru and Bolivia. The date at which agriculture became the main source of subsistence for the inhabitants of Pernil Alto was 3300 BCE.