Flag which can be used to represent the Abbasid Caliphate. Note that the concept of rectangular national flags did not exist during Abbasid times, but black was the dynastic color of the Abbasids (just as green was the dynastic color of the Fatimids, etc.), and the <a href="https://en.wikipedia.org/wiki/Black_Standard" class="extiw" title="en:Black Standard">"black banner"</a> of the Abbasids is famous in Islamic history.
<a href="//commons.wikimedia.org/wiki/User:Ec.Domnowall" title="User:Ec.Domnowall">Ec.Domnowall</a>
2014-07-14
<span class="int-own-work" lang="en">Own work</span>