Сообщение от Lokky
Significantly, while Unas' pyramid is the smallest of the royal pyramids build during the Old Kingdom, it was the first that we know of to have its internal walls inscribed with the various (128) spells making up the Pyramid Text. The texts, meant to aid the pharaoh's soul on its journey to the next world, would adorn the walls of many future pyramids and tombs and is the earliest large religious composition known from ancient Egypt. Unas' pyramid also established the typical plan of the internal chambers for pyramids that would be used through the end of the 6th Dynasty.

достоверных фактов у меня нет. и нет у меня достаточно правдоподобной теории по поводу предназначения.
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