Lower Egypt (Egyptian: "Ā-meḥty"), from the Old Kingdom capital Memphis to the Mediterranean Sea, comprised 20 nomes.
From there the numbering progressed downriver in an orderly fashion along the narrow fertile strip of land that was the Nile valley.
Waset (ancient Thebes or contemporary Luxor) was in the Fourth Nome, Amarna in the Fourteenth, and Meidum in the Twenty-first.
The nomes of Egypt retained their primary importance as administrative units until the fundamental rearrangement of the bureaucracy during the reigns of Diocletian and Constantine the Great.
When the central government was weaker, however—such as during foreign invasions or civil wars—individual nomes would assert themselves and establish hereditary lines of succession.
[4] Conflicts among these different hereditary nomarchies were common, most notably during the First Intermediate Period, a time that saw a breakdown in central authority lasting from the 7th–11th Dynasties which ended when one of the local rulers became strong enough to again assert control over the entire country as pharaoh.
Note: Nome Name Inebu-hedj Memphites Khepesh Letopolites Imentet/Amentet Gynaikopolites Nit Resy/Nit Resu Prosopites Nit Resy/Resu Phthemphouth Nit Meḥtet Saites Khasuu Xoites Huu-(ges)-Imenti Menelaites Huu-(ges)-Iabty Heroopolites Andjety Bousirites Kem-Wer/Ka-kem Athribites (Ka)-Heseb Leontopolites Tjeb-Ka/Tjeb-Netjer Sebennytes Heka-Adj Heliopolites Khenti-Iabti Sethroites Djeḥuti Mendesios Hatmehyt Mendesios Behdet/Sema-Behdet Diospolites Kato Imty Khenti Boubastites Imty Pehu Tanites Sopdu Arabia Nome Name Ta-Seti Wetjes-Hor Nekhen Waset Bikuy/Netjerui/Herui Iqer/Meseh Bat/Seshesh Ta-wer Min Wadjet Sha Dju-fet Atef Khentet/ Nedjefet Khentet Atef Peht/Nedjfet Peht Wenet Ma-Ḥedj Anpu/Anput Nemty Wabwi/Wabui Nart Khentet Nart Peht Mednit/Medenit