The pyramids of Giza were constructed in ancient Egypt, primarily during the Old Kingdom period, around 2580 to 2560 BC. The most famous of these, the Great Pyramid of Giza, was built for the Pharaoh Khufu, also known as Cheops. These monumental structures served as tombs for pharaohs and were part of a larger complex that included temples and smaller pyramids for queens and nobles. The construction of the pyramids involved thousands of workers, including skilled laborers and craftsmen, and showcased advanced engineering techniques. The pyramids remain a testament to ancient Egyptian civilization and its remarkable achievements in architecture and art.