A pyramid is a solid structure with square shaped base and the four sides in the form of an equilateral triangle. These geometrical structures are highly stable and are primarily made of masonry or stone. These fascinating edifices were built in assorted complexities, types and sizes in the bygone eras. The different parts of the world constructed pyramids for religious reasons. The history of China and Egypt tells that these structures were made as the tombs and monuments revered to the emperors and leaders of the country. The Indians and Americans built pyramids as their religious shrines.