greenhouse <i>"Loki Schmidt"</i> in botanical garden of university of Rostock with <a href="https://en.wikipedia.org/wiki/Butterfly_roof" class="extiw" title="en:Butterfly roof">butterfly roof</a> (left of the picture) and monopitch roof.
<a href="//commons.wikimedia.org/w/index.php?title=User:Sumwiki&amp;action=edit&amp;redlink=1" class="new" title="User:Sumwiki (page does not exist)">Marcus Sümnick</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>