Ur was an important Sum.erian city-state in ancient Mesopotamia, located at the site of modern ‘Tel Muqeihar/Muqayyar’ - ‘mound of bitumen’. Originally Ur was a coastal city near the mouth of the Euphrates on the Persian Gulf.
See:
- http://www.ur-online.org/location/18/
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Appendix, The Southern Margins of Sumer – Archaeological Survey of the Area of Eridu and Ur, Henry T. Wright, 1966, in ADAMS R. McC. (1981), Heartland of Cities. Surveys of Ancient Settlement and Land Use on the Central Floodplain of the Euphrates, University of Chicago Press ( https://archive.org/details/heartlandofcitie0000adam/page/n5/mode/2up )
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BENATI Giacomo, LEONI Elena & MANTELLINI Simone (2017), Georeferencing Woolley’s “Royal Cemetery” and Deep Soundings at Ur (Iraq), OCNUS, 24 (https://www.researchgate.net/publication/316542993_Georeferencing_Woolley's_Royal_Cemetery_and_Deep_Soundings_at_Ur_Iraq )