One of the last photographs of <a href="//commons.wikimedia.org/wiki/Abraham_Lincoln" title="Abraham Lincoln">Abraham Lincoln</a>.
<bdi><a href="https://en.wikipedia.org/wiki/en:Alexander_Gardner_(photographer)" class="extiw" title="w:en:Alexander Gardner (photographer)"><span title="Scottish photographer (1821–1882)">Alexander Gardner</span></a>
</bdi>
February 5, 1865 or April 10, 1865.
<a rel="nofollow" class="external free" href="http://hdl.loc.gov/loc.pnp/cph.3a11367">http://hdl.loc.gov/loc.pnp/cph.3a11367</a>