Notre Dame <a href="https://en.wikipedia.org/wiki/oil_painting" class="extiw" title="w:oil painting">oil</a> on <a href="https://en.wikipedia.org/wiki/panel_painting" class="extiw" title="w:panel painting">panel</a><div style="display: none;">medium QS:P186,Q296955;P186,Q106857709,P518,Q861259</div>, Signature and date bottom left:  
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<p>C. Guilloux 1905
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<bdi><a href="https://en.wikipedia.org/wiki/en:Charles_Guilloux" class="extiw" title="w:en:Charles Guilloux"><span title="French artist (1866–1946)">Charles Guilloux</span></a>
</bdi>
<a rel="nofollow" class="external free" href="https://fr.pinterest.com/omardias/charles-victor-guilloux-1866-1946/">https://fr.pinterest.com/omardias/charles-victor-guilloux-1866-1946/</a>