Entrance of the former buildings of the <a href="https://en.wikipedia.org/wiki/%C3%89cole_Polytechnique" class="extiw" title="en:École Polytechnique">École Polytechnique</a> (now located in <a href="https://en.wikipedia.org/wiki/Palaiseau" class="extiw" title="en:Palaiseau">Palaiseau</a>), rue Descartes, Paris. Built by architect André Marie Renié (1789-1855) between 1835 and 1838.
<a href="//commons.wikimedia.org/wiki/User:NonOmnisMoriar" title="User:NonOmnisMoriar">NonOmnisMoriar</a>
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<span class="int-own-work" lang="en">Own work</span>