The signature of Alvar Aalto on the wall of Jyväskylä's theatre building (Finland).
<a href="//commons.wikimedia.org/w/index.php?title=User:Erkkap&amp;action=edit&amp;redlink=1" class="new" title="User:Erkkap (page does not exist)">Erkkap</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>