Inside the burial chamber in the Pyramid of Unas decorated with Pyramid Texts, mid-24th century BC, Saqqara.
The Pyramid Texts are the oldest religious writings known to exist. They were first recorded in the pyramid of Unas, last king of Egypt’s 5th Dynasty, and are called “Pyramid Texts” because they were carved in columns on the inner walls of the pyramid.
Pyramids before Unas’ appear to have been undecorated on the inside. As the name suggests, these texts were reserved for the royal dead, and do not seem to have been available to the administrative elite for use in their tombs.