Scientists say they have found a hidden chamber in Egypt’s Great Pyramid of Giza, in what would be the first such discovery in the structure since the 19th century and one likely to spark a new surge of interest in the pharaohs.

In an article published in the journal Nature on Thursday, an international team said the 30-meter (yard) void deep within the pyramid is situated above the structure’s Grand Gallery, and has a similar cross-section.

The purpose of the space is unclear, and it’s not yet known whether it was built with a function in mind or if it’s merely a gap in the pyramid’s architecture. Some experts say such empty spaces have been known for years.

From CVTNews. Story by Brian Rohan.

“This is a premier,” said Mehdi Tayoubi, a co-founder of the ScanPyramids project and president of the Heritage Innovation Preservation Institute. “It could be composed of one or several structures… maybe it could be another Grand Gallery. It could be a chamber, it could be a lot of things.”

The scientists made the discovery using cosmic-ray imaging, recording the behaviour of subatomic particles called muons that penetrate the rock similar to X-rays, only much deeper. Their paper was peer-reviewed before appearing in Nature, an international, interdisciplinary journal of science, and its results confirmed by other teams of scientists.

Chances of the space containing treasure or burial chambers are almost nil, said Aidan Dodson, an Egyptologist at the University of Bristol, but the discovery helps shed light on building techniques.

“The pyramid’s burial chamber and sarcophagus have already been discovered, so this new area was more likely kept empty above the Grand Gallery to reduce the weight of stone pressing down on its ceiling,” he said, adding that similar designs have been found in other pyramids.