ANTON RAPHAEL MENGS (1728=1779) Louis de Visme (1762-67) Oil on canvas (129 x 83 cm) Christ Church College, Oxford (To enlarge the picture, right-click on it and choose "Open in a new tab") Another example of Mengs' excellence as a portraitist. The portrait must have been painted between 1762 and 1767, the years when de …