There's this Newsweek article titled "Ancient Egypt: Incredible Electromagnetic Discovery in Great Pyramid of Giza's Hidden Chambers" (here) that says that
Now, an international team of physicists has found that, under the right conditions, the Great Pyramid can concentrate electromagnetic energy in its internal chambers and under its base.
The results, which are published in the Journal of Applied Physics, could help scientists to create new nanoparticles — particles between 1 and 100 nanometers in size — that could be used, for example, to develop highly efficient solar cells or tiny sensors.
Above article links to this article in the Journal of Applied Physics.
Would the scientist somehow use this pyramid to create the nanoparticles, or did the discovery tell them something about electromagnetism that was not already known?