This lignite briquette, labelled and varnished, was made to commemorate the expansion of a section of the Autobahn 61 in North Rhine-Westphalia.
<a href="//commons.wikimedia.org/wiki/User:Anne_Offermanns" title="User:Anne Offermanns">Anne Offermanns</a>
<span class="int-own-work" lang="en">Own work</span>