THE EVOLUTION OF THE ROYAL TOMBS:5th and 6th Dynasty Pyramids:

During the 5th and 6th Dynasty Old Kingdom, and the scope and construction of the pyramid has changed radically. The last ruler of the dynasty of 5 A, appears to have been the first to enter the texts of the pyramid on the inner walls of the pyramid. This took the form of hieroglyphics to provide guidelines and instructions on how to ensure a safe journey through the underworld and eternal life later.
Level of the labor force in building the pyramid was rejected, along with the political structure and economic development in the Old Kingdom.