Daguerreotype.
<bdi><a href="https://en.wikipedia.org/wiki/en:Hermann_Biow" class="extiw" title="w:en:Hermann Biow"><span title="German photographer">Hermann Biow</span></a>
</bdi>
<a rel="nofollow" class="external autonumber" href="http://blogs.oregonstate.edu/tellvikd/files/2016/03/brothers-Grimm.jpg">[1]</a>