Unas, the last king of the Fifth Dynasty, had funerary compositions inscribed in his pyramid's subterranean apartments during the twenty-fourth century BCE. No earlier surviving pyramid preserves a comparable collection on its chamber walls. That is different from saying that earlier pyramids contained no writing at all: builders' marks and other inscriptions belong to a separate kind of evidence. The texts in Unas's pyramid were arranged in vertical columns of hieroglyphs, with coloured signs set against the pale stone. The architecture and the placement of writing worked together, surrounding the burial with words intended to protect and transform its occupant.

Later rulers, including Teti, Pepi I, Merenre and Pepi II, used and expanded the tradition. Queens also received Pyramid Texts, an important correction to the idea that the entire corpus was reserved for male kings alone. Each monument contains its own selection and arrangement. Modern editors number the individual compositions as spells or utterances, but totals depend on the edition, new discoveries and decisions about where one composition ends and another begins. Hundreds of surviving texts preserve several overlapping kinds of ritual and religious language rather than a single fixed sequence.

Some compositions are closely tied to offering rites. Bread, beer, incense, clothing and other necessities are presented to the deceased through words that make the offerings effective in the world beyond death. Rubrics meaning words to be spoken connect parts of the collection with recitation; they do not appear simply as an identical instruction at the end of every spell. The texts can speak to the dead ruler, speak in the ruler's voice or invoke divine participants. They preserve traces of performed ritual, but their surviving written arrangements do not supply a complete, unchanging script for one funeral ceremony.

Other utterances describe transformation and ascent. The ruler rises on a ladder, crosses the sky in a boat or takes the form of a bird. Ra offers a solar setting, while the imperishable stars represent another form of continued existence. Nut can receive and protect the deceased, and the relationship between Osiris and Horus offers language for renewed life and the continuity of kingship. These images need not be reduced to one timetable in which every king sails with Ra by day and rests with Osiris by night. Different compositions use different relationships and destinations to express the same urgent purpose: the dead must remain capable of life.

The Cannibal Hymn, conventionally numbered Utterances 273 and 274, uses especially striking language. Preserved in the pyramids of Unas and Teti, it presents the king consuming gods and absorbing their powers. Divine beings become the source of strength that the ruler incorporates into himself. This is ritual and mythic imagery, not evidence that the buried king practised literal human cannibalism. Its force comes from reversing an expected relationship: the deceased is not only dependent on the gods' protection but is represented as possessing their authority.

The collection also guards against threats. Hostile beings, dangerous animals and obstacles to movement can be addressed, repelled or overcome through knowledge and speech. The king's body is restored, his limbs are associated with divine powers, and his name and continued effectiveness are protected. Some compositions preserve very old forms of language or ritual, but the age of each underlying tradition cannot be calculated simply from the date of the wall on which it survives. The first surviving inscription of a spell is evidence for its use at that time, not proof of the exact moment when it was composed.

The Pyramid Texts were transmitted beyond the royal pyramids. Copies and adaptations appeared in later tombs and on coffins, interacting with the broader collection known as the Coffin Texts. The Book of the Dead developed much later, particularly from the New Kingdom onward, while older material continued to be used. This history should not be described as a moment when ordinary Egyptians first acquired an afterlife that had previously belonged only to kings. Earlier non-royal funerary practices already expressed expectations of continued existence; what changed included the circulation, selection and material setting of particular texts.

Modern knowledge of the corpus expanded through the clearance and study of the Saqqara pyramids in the late nineteenth century, including the work associated with Gaston Maspero in 1880-1881. Maspero published the inscriptions, and later editions and translations by scholars such as Kurt Sethe, R. O. Faulkner and James P. Allen made them more widely available. The recovery did not mean that the texts had been forgotten immediately after the Old Kingdom, since later copies demonstrate continued transmission in antiquity. Today their importance lies in that long history as well as their early date: they show religious language being selected, arranged, inherited and transformed across many generations.