Although Ur was once a coastal city near the mouth of the Euphrates on the Persian Gulf , the coastline has shifted and the city is now well inland , south of the Euphrates on its right bank , 16 kilometres ( 9.9 mi ) from Nasiriyah .
Ur was once a coastal city near the mouth of the River Euphrates on the Persian Gulf . It is now well inland , south of the Euphrates on its right bank , 16 km from Nasiriyah , Iraq .