 The excavations by Flinders Petrie revealed that this sector included armouries.For almost a century and a half, the city remained the capital of the Persian satrapy of Egypt ("Mudraya"/"Musraya"), officially becoming one of the epicentres of commerce in the vast territory conquered by the Achaemenid monarchy.The steles dedicated to Apis in the Serapeum at Saqqara, commissioned by the reigning monarch, represent a key element in understanding the events of this period.