Al-Istakhri map of Tigris and Euphrates valley from Bagdad to Persian Gulf's coast.
<bdi><a href="https://en.wikipedia.org/wiki/en:Istakhri" class="extiw" title="w:en:Istakhri"><span title="Iranian geographer">Istakhri</span></a>
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9<sup>th</sup> century <div style="display: none;">date QS:P,+850-00-00T00:00:00Z/7</div>
Les Cahiers de Sciences et Vie No114; <i>The Book of roads and kingdoms</i> by Istakhri