Plaque for <a href="https://en.wikipedia.org/wiki/Otto_Lenel" class="extiw" title="en:Otto Lenel">Otto Lenel</a> in front of his former house in Freiburg im Breisgau, Holbeinstraße 5
<a href="//commons.wikimedia.org/wiki/User:Ireas" title="User:Ireas">ireas</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>