Commemorative plaque for Dmitri Mendeleev (Дмитрий Менделеев) at the Saint Petersburg State University in Saint Petersburg, Russia. Picture taken on July 18, 2019
<a href="//commons.wikimedia.org/wiki/User:LinguineFusilli" title="User:LinguineFusilli">Linus Folke Jensen</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>