The Egyptians believed that the unmovable area the stars circled was heaven. The pyramids were built to align north with a single, perfectly aligned vent. The shaft itself, built into the structure, started at the chamber of King Khufu, and ending at the outside. The shaft was built at an angle, so it could always see The Indestructibles. Their naming "Indestructibles" is directly related to the fact that they encircle heaven. The Egyptians built this vent in the pyramids in order to ensure a perfectly (although recent researches have rendered them not completely perfect) aligned path towards heaven. Because the builders who built those pyramids participated in the act of easing the King or Queen's path to the Indestructibles, they too were guaranteed a position in heaven.