Akademie Mont-Cenis in Herne, Germany, a glass covered building on wooden pillars with buildings for education, living, meeting halls, and a library inside. More than a half of the glass panes on top and south and west side have solar cells for producing electric energy.
<a href="//commons.wikimedia.org/wiki/User:Arnoldius" title="User:Arnoldius">Arnold Paul</a>
CC BY-SA 2.5
<span class="int-own-work" lang="en">Own work</span>