The Mosque of Amr ibn al-As in southern Cairo is the oldest in Egypt, founded in 642 AD by the Arab general who defeated the Byzantine forces at Alexandria.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/79721788@N00">David Stanley</a> from Nanaimo, Canada
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/davidstanleytravel/8591305436/">Mosque of Amr ibn al-As</a>