The Dunker Church at <a href="https://en.wikipedia.org/wiki/Antietam_National_Battlefield" class="extiw" title="en:Antietam National Battlefield">Antietam National Battlefield</a>, Sharpsburg, Maryland, USA.
<a href="//commons.wikimedia.org/wiki/User:Acroterion" title="User:Acroterion">Acroterion</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>