<a href="https://de.wikipedia.org/wiki/Montessorip%C3%A4dagogik" class="extiw" title="de:Montessoripädagogik">Montessori</a>-Schule in Aachen
<a href="//commons.wikimedia.org/wiki/User:T%C3%BArelio" title="User:Túrelio">Túrelio</a>
CC BY-SA 3.0 de
own work (distortion slightly corrected with <a href="https://de.wikipedia.org/wiki/ShiftN" class="extiw" title="de:ShiftN">ShiftN program</a>)