Pedro de Sousa Holstein, still Marquess of Palmela, wearing the costume of Peer of the Realm and ermine cloak.
<bdi><a href="//commons.wikimedia.org/wiki/Category:19th-century_portrait_paintings_of_men,_artist,_location_and_year_missing" title="Category:19th-century portrait paintings of men, artist, location and year missing">Unidentified painter</a>
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between 1823 and 1833 <div style="display: none;">date QS:P571,+1850-00-00T00:00:00Z/7,P1319,+1823-00-00T00:00:00Z/9,P1326,+1833-00-00T00:00:00Z/9</div>
BONIFÁCIO, Maria de Fátima (2011), Memórias do Duque de Palmela. Publicações Dom Quixote. 1.ª edição, Alfragide. ISBN: 978-972-20-4505-6.