Portrait of Major General John Armstrong with John Churchill, 1st Duke of Marlborough. Oil on canvas. 91 in. x 77 in. Courtesy of the National Portrait Gallery, London.
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Unknown author<span style="display: none;">Unknown author</span></div>
between circa 1711 and circa 1720 <div style="display: none;">date QS:P571,+1750-00-00T00:00:00Z/7,P1319,+1711-00-00T00:00:00Z/9,P1326,+1720-00-00T00:00:00Z/9,P1480,Q5727902</div>
National Portrait Gallery, London <a rel="nofollow" class="external autonumber" href="http://www.npg.org.uk/collections/search/portrait.php?search=ss&amp;firstRun=true&amp;sText=armstrong&amp;page=1&amp;LinkID=mp05021&amp;rNo=0&amp;role=sit">[1]</a>