Allegory of architecture by Hanns Anker
Hanns Anker
<i>Die Architektur der neuen freien Schule</i> (<a rel="nofollow" class="external free" href="https://archive.org/details/gri_33125009292133/page/n3/mode/2up">https://archive.org/details/gri_33125009292133/page/n3/mode/2up</a>)