Italian scientist Amadeo Avogadro
The original uploader was <a href="https://en.wikipedia.org/wiki/de:User:Anton" class="extiw" title="w:de:User:Anton">Anton</a> at <a href="https://en.wikipedia.org/wiki/de:" class="extiw" title="w:de:">German Wikipedia</a>.
before 1856 <div style="display: none;">date QS:P,+1856-00-00T00:00:00Z/7,P1326,+1856-00-00T00:00:00Z/9</div>
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