There are also many theories about the purpose of the Great Pyramid. Along with not being able to conclude absolutely who built the Great Pyramid, mankind also does not understand why it was built. Many believe that Pharaoh Cheops (or Khufu) built the Great Pyramid for his tomb around 3350 BC, because many of the other pyramids in the area have been found to be burial chambers for the various kings of Egypt. Now there are some that believe the Great Pyramid monument was a time capsule left by an advanced civilization. There may have been some cataclysm and leaders of this civilization wanted to leave a message to future civilizations. Others think it was some civil service project. In Peter Lemesurier’s book The Great Pyramid Decoded, he states the Great Pyramid is a sign by Elohim. He writes: “the Great Pyramid contains a detailed prophecy in mathematical code—a prophecy whose main purpose appears to be the validating of just such a redemptive or Messianic plan for mankind as appears to have been outlined by Jesus of Nazareth (p. 155).”