This pyramid is located in the Egyptian city of Giza and was built in 2560 BC. The ancient Egyptian engineers worked very smartly in the construction of this building. At first, they chose the best place to build the structure, a place that was close to the palace and easy access to the Nile River. The engineers had to complete this structure before the king's death. First, they started building the foundation and found a limestone mine 850 meters from the structure for the stones needed for the building. From the first day, they began extracting the stones. They employed about a thousand workers, whose number eventually reached three thousand. They used primitive tools. Nearby, they planned a place to accommodate the workers and brought food for the troops from far away to the region, most of which was through taxes, although most of the workers worked for free because they were exempt from taxes on their own lands. They skillfully turned two million pieces of stone into the pyramid and spent twenty years. With a height of 146 meters, it was built as the largest structure in the world. The pyramid, which is one of the Seven Wonders of the World and has many secrets,