
The granite core (UC16036) or CORE 7, was found by the archaeologist Petrie in Giza, Egypt, and was made by the ancient Egyptians using a tubular drill. 4th Dynasty (2613–2494 BCE), now housed at the Petrie Museum of Egyptian and Sudanese Archaeology in London [1200×1839]
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[https://www.penn.museum/sites/expedition/ancient-egyptian-stone-drilling/](https://www.penn.museum/sites/expedition/ancient-egyptian-stone-drilling/)