Sechin Bajo, Peru: The Location of the Oldest Man-Made Structure of the New World?

Sechin Bajo is an archaeological site in Peru. This site is situated in the Casma Valley of Ancash, a region on the northwestern coast of that South American country. This site is believed to have served as the capital of a pre-Incan culture, and was occupied roughly between 1800 and 1900 BC.

More recently, archaeological excavations at the site have unearthed a circular stone plaza amidst its ruins. This has been regarded as a major discovery, since, based on initial analysis, the structure was dated to around 3500 BC. If this is true, this would indeed be a significant find, as it means that the plaza is the oldest man-made structure in the New World.

The Sechin Complex

Sechin Bajo is part of a larger archaeological area known as the Sechin Complex. The complex has been described as a “vast proto-urban settlement several miles in diameter”. The complex is believed to been centered around a mound called Sechin Alto, and, in addition to Sechin Bajo, includes the sites of Taukachi-Konkan and Cerro Sechin. Based on certain factors, such as the similarity in mound forms and site layout, as well as their orientation, it has been suggested that these sites were likely to have been part of a single, large, continuous settlement.


Map of the location of the Sechin Complex. (Nephicode)