Round window with lattice
<a rel="nofollow" class="external text" href="http://www.lebensgeschichten.org">Benjamin Gimmel,</a> <a href="//commons.wikimedia.org/wiki/User:BenHur" title="User:BenHur">BenHur</a>
CC BY-SA 3.0
<a rel="nofollow" class="external text" href="http://www.gimmels.net/freepip">FreePiP (Free Pictures Project)</a>