The Roman <a href="https://en.wikipedia.org/wiki/Penkalas_Bridge" class="extiw" title="en:Penkalas Bridge">Penkalas Bridge</a> in Aizanoi, Asia Minor (present-day Çavdarhisar in Turkey)
<a href="//commons.wikimedia.org/wiki/User:Kpisimon" title="User:Kpisimon">Klaus-Peter Simon</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>