Map of Erice city wall
<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Maximilian Dörrbecker</a> (<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Chumwa</a>)
CC BY-SA 2.0
<p><span class="int-own-work" lang="en">Own work</span>, using
</p>
<ul><li><a href="//commons.wikimedia.org/wiki/OpenStreetMap" title="OpenStreetMap">OpenStreetMap</a> data</li>
<li>Fabrizio Nicoletti / Sebastiano Tusa: <a rel="nofollow" class="external text" href="https://de.scribd.com/doc/29896475/Fabrizio-Nicoletti-e-Sebastiano-Tusa-Erice-Da-Porta-Trapani-al-Quartiere-Spagnolo-Un-itinerario-turistico-lungo-le-mura-puniche-Alcamo-2001">Erice – Da Porta Trapani al Quartiere Spagnolo</a>. Alcamo 2001</li></ul>