For many centuries, the secrets of the construction of the Egyptian pyramids excite the minds of not only researchers, but also all who are interested in the development of mankind. Many scientists claim that in preparing for the construction of the pyramids, the Egyptians did astronomical calculations so that the location of the giant man-made objects corresponded to the position of the planets. In Egypt, there are about a hundred pyramids. Many of them are so amazing that travelers came to admire them and even in the days of the ancient Romans and Greeks.