Mosque of Ibn Tulun, Cairo.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/10807466@N03">Charlie Phillips</a> from London, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/savingfutures/3947384621/">Mosque of Ibn Tulun, Cairo.</a>