Decentralization during the First Intermediate Period left the individual Egyptian provinces, or Nomes, under the control of powerful families who held the hereditary title of Great Chief of the Nome, or Nomarch.[66] This position developed during the Fifth and Sixth Dynasties, when the various powers of Old Kingdom provincial officials began to be exercised by a single individual.[66] At roughly this time, the provincial aristocracy began building elaborate tombs for themselves, which have been taken as evidence of the wealth and power which these rulers had acquired as nomarchs.[66] By the end of the First Intermediate Period, some nomarchs ruled their nomes as minor potentates, such as the nomarch Nehry of Hermopolis, who dated inscriptions by his own regnal year.[2]