Steam engine of the paddle steamer Pirna
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/50402151@N00">Ralf Schulze</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/50402151@N00/3282527960">Dresden_07_2008_ 069</a>