
Ī second gallery of chambers, now known as the "Greater Vaults", was excavated under Psamtik I (664–610 BC) of the Twenty-sixth Dynasty and later extended to approximately 350 m in length, 5 m tall and 3 m wide by the Ptolemaic dynasty along with a long, parallel service tunnel. But for one, all chambers were found emptied of their contents except for a disarray of dedication stelae. Working as an administrator during the reign of his father, Khaemweset, a son of Ramesses II (1279–1213 BC) of the Nineteenth Dynasty, ordered that a tunnel be excavated at the site, and a catacomb of galleries – now known as the "Lesser Vaults" – be designed with side chambers to contain the sarcophagi for the mummified remains of the bulls. The most ancient burials found at this site date back to the reign of Amenhotep III, the ninth pharaoh of the Eighteenth Dynasty during the 1350s BC.
