The three-millennia-old mummy is thought to have been originally left as a sacrifice inside the tomb during the final construction phase of an ancient temple.
The incredible discovery was made in the capital Lima on Wednesday, the latest find in the Andean nation dating to pre-Hispanic times.
Students from San Marcos University and archaeological researchers initially found remains of the mummy’s hair and skull in a cotton bundle during excavation, before uncovering the rest of the mummy.
Some eight tonnes of rubbish had to be removed from the location before excavation of the remains could begin on the site.
The remains of a mummy in Lima, Peru, believed to be from the Manchay culture which developed in the valleys of Lima between 1,500 and 1,000 BCE
The mummy is thought to date back to the Manchay culture, archaeologist Miguel Aguilar said.
The Manchay is a pre-Inca indigenous polity which developed in the valleys of Lima between 1500 and 1000 BC.
The group are associated with the construction of temples built in a U-shape that pointed toward the sunrise.
The person ‘had been left or offered (as a sacrifice) during the last phase of the construction of this temple,’ Aguilar said. ‘It is approximately 3,000 years old.’
Archeologists unearthed other items buried with the body, including corn, coca leaves and seeds, which they believe may have been part of an offering.
Mr Aguilar said that the newly discovered mummy had been placed in the tomb at the centre of a U-shaped temple.
He added that the condition of the remains aligned with characteristics from the Manchay culture as the body had been laid out flat.
The remains were also found wrapped in cloth made from cotton and vegetable fibre.
The head of mummy and the outline of the whole body are seen as an archaeologist works at the excavation site of a pre-Hispanic burial
The remains of a mummy, believed to be from the Manchay culture are pictured at the excavation site of a pre-Hispanic burial, in Lima, Peru
People stand near the excavation site of a pre-Hispanic burial with a mummy, Lima, Peru
Mr Aguilar said the individual is believed to have been ‘left or offered [as a sacrifice] during the last phase of construction of this temple’.
Mummification was practiced by several ancient cultures around the world and specifically within what is now modern day Peru.
The mummies were buried in both the foetal position and laid flat, white others were brought out and paraded during festivals of the pre-Hispanic cultures.