Giovanni Battista Lampi Das Ehepaar Potocki und der Künstler Ausschnitt, circa 1791

(hans rudolph füeßli: reflections on portrait painting in general and especially in vienna. With a short description of the life and the most important works of the imperial knight and professor von lampy. In: annals of the fine arts for the austrian states. 2nd part, schaumburg and company, vienna 1802, pp. 63-78, here: p. 74. ). Date: circa 1791.