The emergence of Amul, as well as four other ancient and medieval cities of Central Amu Darya -- Kalifa (Kelif), Zemm-Kerkuha (Kerki ), Navidaha (ruins Keshka Zuhra-Tahir in Burda-bast) and Firabra-Bityka (Farap), determined by the location in convenient crossing points of Ceyhun-Amu Darya.