Usermaatre Setepenamun Osorkon III Si-Ese was Pharaoh of Egypt in the 8th Century BC. He is the same person as the Crown Prince and High Priest of Amun Osorkon B, son of Takelot II by his Great Royal Wife Karomama II. Prince Osorkon B is best attested by his Chronicle—which consists of a series of texts documenting his activities at Thebes—on the Bubastite Portal at Karnak. He later reigned as king Osorkon III in Upper Egypt for twenty-eight years after defeating the rival forces of Pedubast I/Shoshenq VI who had apparently resisted the authority of his father here. Osorkon ruled the last five years of his reign in coregency with his son, Takelot III, according to Karnak Nile Level Text No. 13. Osorkon III's formal titulary was long and elaborate: Usermaatre Setepenamun, Osorkon Si-Ese Meryamun, Netjer-Heqa-waset.
A relief depicting Osorkon in his early career, when he was the High Priest of Amun during the reign of his father Takelot II. The relief also bears his ancestry as a son of queen Karomama II, daughter of Nimlot C, son of Osorkon II.
The High Priest of Amun or First Prophet of Amun was the highest-ranking priest in the priesthood of the ancient Egyptian god Amun. The first high priests of Amun appear in the New Kingdom of Egypt, at the beginning of the Eighteenth Dynasty.
The god Amun in Karnak.
Senenu, High Priest of Amūn at Deir El-Baḥri, grinding grain, c. 1352–1292 B.C. (to the end of the 18th Dynasty), Limestone, Brooklyn Museum.
Pinudjem II as High Priest
Image: King Herihor Adore Osiris
