[6] A stele found at Hermopolis[7] provides some evidence that he came to power by overthrowing, and possibly putting to death, the last pharaoh of the 29th Dynasty Nepherites II.

[13] On the sacred island of Philae near Aswan, he began the temple of Isis, which would become one of the most important religious sites in ancient Egypt, by erecting its vestibule.

A decree dated to his first year and discovered on a stele at Naucratis, required that 10 percent of taxes collected both from imports and from local production in this city were to be used for the temple of Neith at Sais.

[18] The aforementioned stele from Hermopolis, placed before a pylon of Ramesses II, lists the donations made by Nectanebo to the local deities, and other benefits were also granted to the priesthood of Horus at Edfu.

[11] In 374/3 BCE Nectanebo had to face a Persian attempt to retake Egypt, which was still considered by the Achaemenid king Artaxerxes II nothing more than a rebel satrapy.

Towards the end of his reign (in Year 16 – 364/3 BCE), probably to remedy the dynastic problems that plagued his predecessors, Nectanebo restored the long-lost practice of the co-regency, associating his son Teos to the throne.

However, shortly after Teos' accession, his brother Tjahapimu betrayed him and managed to put his own son Nakhthorheb (Nectanebo II) onto the Egyptian throne.