15th-century Chan Chan mass grave discovered in Peru

In the 15th century, a group of elite women in the ancient city of Chan Chan spent their days making textiles while living ... and in death.

Archaeologists recently uncovered a mass grave in the Trujillo province of modern-day Peru that held the remains of about 25 people, mostly women and a couple of children and teenagers, surrounded by textile tools, including needles, spindles and chalk, according to a statement from the Peruvian Ministry of Culture.

Because the women were buried with these items, they were likely "people dedicated to textiles," according to the statement. The women were buried in a seated position, with their legs bent, and most were under age 30.

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"It is a very specific population, not too young considering the average human life span was 40 years," Jorge Meneses Bartra, an archaeologist who leads the research project, told Andina, a Peruvian news agency. The skeletons were wrapped with a cotton fabric that was then covered with another fabric made from plant tissue. 

The number of grave goods found in the grave pit — including dozens of ceramic objects — suggests that the people buried were elite, according to Smithsonian Magazine.

Archaeologists uncovered the mass grave, which stretched 32 feet (10 meters) long and wide, sealed with mud that contained jar fragments, which may have served as a tomb marker, according to the statement. 

The ancient city of Chan Chan, which means "resplendent sun" in the Chimú language, was the largest city in pre-Columbian America and the capital of the Chimú Empire, which was known to perform rituals involving human sacrifices, according to the BBC and Britannica. The empire reached its height in the 15th century, before the Incas conquered it around A.D. 1470.

Archaeologists have yet to find any evidence that the human remains in the recently uncovered grave were the result of such sacrifices; in fact, the researchers don't yet know how the people died, Meneses said in the statement. 

However, the archaeologists do believe that there were two separate mass burials in the same grave. Within the grave, the archaeologists discovered one skeleton that "maintains its anatomical position" and another whose bones were jumbled and exposed to the elements, according to the statement. 

This finding suggests that the ancient people buried some of these individuals right after they died and some later on. They likely brought the remains of the second group of people from another burial place, according to the researchers.

"This shows that the Chimu used to relocate and manipulate their deceased," Sinthya Cueva García, director of the Chan Chan Archaeological Complex Special Project's Archaeological Research Program, said in the statement. 

Originally published on Live Science.