🚪 Pyramids of Giza: discovery of a potential hidden entrance

Discoveries about Egypt's pyramids are not over. The most recent one concerns the Pyramid of Menkaure: an international team has just identified two empty spaces behind its eastern face, which could indicate the presence of an entrance unknown until now.

The Pyramid of Menkaure, the smallest of the three great pyramids of Giza, is distinguished by its casing of Aswan granite. For years, archaeologists have thought that another entrance might exist on its eastern side, due to polished blocks similar to those of the north entrance. This intuition now finds strong scientific support.


This discovery is the result of an international collaboration. Scientists from Cairo University and TUM, as part of the ScanPyramids project, used non-destructive techniques to examine the pyramid (see below). Ground-penetrating radar, ultrasound, and electrical resistivity tomography detected two air-filled cavities at depths of approximately 4.6 feet (1.4 meters) and 3.7 feet (1.13 meters). This combination of methods was essential for obtaining precise results without damaging the structure.

The Image Fusion method, which merges measurement data, played a central role in confirming these anomalies. The voids measure approximately 3.3 feet high by 4.9 feet wide (1 meter by 1.5 meters) and 2.95 feet by 2.3 feet (0.9 meters by 0.7 meters) respectively. This innovative approach allows for a better understanding of the pyramids' interiors while preserving their integrity.

Christian Grosse, a professor at TUM, indicated that this discovery follows the validation of a hidden corridor in the Great Pyramid of Khufu in 2023. He believes the hypothesis of an additional entrance is highly plausible, and these results represent a notable advancement. Work is continuing to explore these spaces and verify their potential function.


This study is part of a broader effort to understand ancient Egyptian constructions. Non-destructive techniques provide valuable tools for modern archaeology, allowing for in-depth investigations without risking damage to the monuments. Future steps could include further exploration to confirm the nature of these voids.

The publication of the results in NDT & E International marks an important milestone. It paves the way for new research on the pyramids, combining cutting-edge technology and historical knowledge. Archaeology enthusiasts can expect further revelations in the years to come.

Non-destructive investigation techniques

Modern archaeology increasingly uses methods that avoid damaging historical sites. Ground-penetrating radar, for example, sends electromagnetic waves into the ground to detect variations in materials. This allows for the detection of hidden structures like chambers or tunnels without digging.

Ultrasound works similarly by using high-frequency sound waves. It is particularly useful for analyzing the integrity of construction materials, like the granite blocks of the pyramids. By measuring the speed of wave propagation, researchers can identify voids or defects.

Electrical resistivity tomography measures the resistance of the ground or structures to the passage of an electrical current. Variations in resistance indicate changes in composition, such as the presence of air or water. Combined with other techniques, it offers a detailed picture of a monument's interior.

These approaches are often combined in projects like ScanPyramids to maximize accuracy. They represent a major evolution in the study of cultural heritage, enabling discoveries while preserving the authenticity of sites for future generations.