Sed festivals implied elaborate temple rituals and included processions, offerings, and such acts of religious devotion as the ceremonial raising of a djed, the base or sacrum of a bovine spine, a phallic symbol representing the strength, "potency and duration of the pharaoh's rule".[6] One of the earliest Sed festivals for which there is substantial evidence is that of the Sixth Dynasty pharaoh Pepi I Meryre in the South Saqqara Stone Annal document. The most lavish, judging by surviving inscriptions, were those of Ramesses II and Amenhotep III. Sed festivals still were celebrated by the later Libyan-era kings such as Shoshenq III, Shoshenq V, Osorkon I, who had his second Heb Sed in his 33rd year, and Osorkon II, who constructed a massive temple at Bubastis complete with a red granite gateway decorated with scenes of this jubilee to commemorate his own Heb Sed.