Sankore Mosque in Timbuktu.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/48600082269@N01">upyernoz</a> from Haverford, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/upyernoz/6917859/">Sankore Mosque, Timbuktu</a>