Sumo sacerdote de Amón
Pedubast I was the main opponent to Takelot II and later, Osorkon B, of the 23rd Dynasty of Libyan kings of Upper Egypt at Thebes. His accession to power plunged Thebes into a protracted civil war which lasted for nearly three decades between these two competing factions. Each faction had a rival line of High Priests of Amun with Pedubast's being Harsiese B who is attested in office as early as Year 6 of Shoshenq III and then Takelot E who appears in office from Year 23 of Pedubast I. Osorkon B was Pedubast I and Harsiese's chief rival. This conflict is obliquely mentioned in the famous "Chronicle of Prince Osorkon" at Karnak. Recent excavations by the University of Columbia in 2005 reveal that Pedubast I's authority was recognised both at Thebes and in the western desert oases of Egypt—at the Great Temple of Dakhla where his cartouche has been found. He was succeeded in power by Shoshenq VI.