North wing of the cotton mill building at <a href="https://en.wikipedia.org/wiki/Crespi_d%27Adda" class="extiw" title="w:Crespi d'Adda">Crespi d'Adda</a>, Italy.
<a href="//commons.wikimedia.org/wiki/User:Daniel_Case" title="User:Daniel Case">Daniel Case</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>