Pyramid of Giza, the oldest of the Seven Wonders, The pyramid was the tallest building in the world for over 3800 Years , It was probably built for khufu, an egyptian pharaoh, its believed that it took about 20 years to build and was completed around 2570 BC. The Ancient Egyptians, gather 2,300,000 blocks of limestone and granite to built the Great Pyramid. Continuing to Cairo’s Egyptian Museum, more than a quarter million artifacts, the most important collections in the museum, including the treasures unearthed from the tomb of king Tutankhamen, It has 120,000 items.