DAVID, John (1743-1790). Portrait of Ernestine countess Durress, born Countess Weissenwolff, imperial ambassador to Venice. [CON:] Portraits of Count Durres [c.a 1775.] Couple of the refined portraits engraved by Ernestin countéss Duréssa Durres, born Weiessenwolf and her husband, the famous diplomat, librarian and collector Giacomo Durres (1717-1794), imperial Ambassador to the Republic of Venice and between the main protagonists of the 18th century European cultural life. The portraits made by Giovanni David with etching and acquatinta with interventions at the burin of Giovanni Vitalba, are distinguished by the elegance of the composition and the rich allegorical frame that encloses the profiles of the noble couple. Etching and aquating both (266 × 210 mm at bar; sheet 445 × 350 mm). Signed at the bottom left: David Gen. inv. et ornav. and on the right: Vitalba vultum perfect.