Misidentified as "<a href="//commons.wikimedia.org/wiki/Antonio_Stradivari" class="mw-redirect" title="Antonio Stradivari">Antonio Stradivari</a>", more likely <a href="//commons.wikimedia.org/wiki/Claudio_Monteverdi" title="Claudio Monteverdi">Claudio Monteverdi</a><br>This portrait is in fact not of the violinmaker <a href="https://en.wikipedia.org/wiki/Antonio_Stradivari" class="extiw" title="w:Antonio Stradivari">Antonio Stradivari</a>, but is the portrait of <a href="https://en.wikipedia.org/wiki/Claudio_Montiverdi" class="extiw" title="w:Claudio Montiverdi">Claudio Montiverdi</a>, a 16th - 17th century baroque composer, but was confused as being a portrait of Stradivari in the 19th century, as determined by the Hill family of the 19th and 20th centuries England, this information recorded in the Hill's famous book about Antonio Stradivari, his life.  I hope I have been helpful.
<bdi><a href="https://en.wikipedia.org/wiki/en:Fr%C3%A9d%C3%A9ric-D%C3%A9sir%C3%A9_Hillemacher" class="extiw" title="w:en:Frédéric-Désiré Hillemacher"><span title="French printmaker (1811-1886)">Frédéric-Désiré Hillemacher</span></a>
</bdi>
1886 (engraver)
<a rel="nofollow" class="external text" href="http://gallica.bnf.fr/ark:/12148/btv1b8425074g.r=.langEN">Gallica</a>