The present work compares with a portrait of Napoleon by Jean-Baptiste Isabey and Charles Percier, entitled, L'Empereur en grand costume, illustrated in the Livre du Sacre [Book of the Coronation], Paris, 1805, pl. IX. A similar-sized full-length watercolour by Isabey, signed and dated 1808, of Empress Josephine in corresponding colours to the dress worn by the Emperor in the present portrait, is in the Louvre (inv. no. RF 3829). For further information see exhibition catalogue Jean-Baptiste Isabey (1767-1855), portraitiste de l'Europe, Musée national des Châteaux de Malmaison et Bois-Préau and Musée des Beaux-Arts de Nancy, 2005-2006, p. 129, no. 63, illustrated in colour p. 47.