Osorkon II was the fifth king of the Twenty-second Dynasty. There are inscriptions in the hypostyle hall of the Luxor temple that indicate that there was a very high inundation of the Nile during the third year of his reign. The inscription says, "All the temples of Thebes were like marshes." During his twenty-second year, he celebrated the Sed Festival. He built a granite gateway at the great temple at Bubastis and decorated the gateway with scenes of this festival. During his reign, there was weakness internally and there were threats from the Assyrians. Egypt's borders did not extend as far as they once had and tried to resist the increasing pressures from the east by joining the states of Palestine and Syria. It is possible that a co-regent ruled with
Osorkon II named Harsiese, who was the high priest of Amun at Thebes. It is possible that Harsiese was the son of Osorkon. His tomb has been found at Tanis. It was constructed of large stones with several chambers inside. Several other bodies were found inside such as King Takelot II. Source: www.touregypt.net