Jean-Jacques de BOISSIEU (Lyon 1736 - 1810) Bust portrait of Pope Pius VII Pen, brown ink, brown wash and white gouache highlights on beige paper. (Tears at right edge, small loss at lower left. Slightly oiled, small stains). 9.2 x 8.6 cm We know the engraving dated 1805, entitled Le pape Pie VII bénissant des enfants pendant son séjour à Lyon, as well as another preparatory drawing for the engraving (see : L'Œuvre gravée de JJ. de Boissieu, Édition du Tricorne, Cabinet des estampes, MCMXCIV, Genève, p. 282, fig.130, reproduced).