1725-1802 French Joseph Siffred Duplessis Locations French painter. He trained with his father, an amateur painter, and then with Joseph-Gabriel Imbert (1666-1749), a pupil of Charles Le Brun. In 1744 he went to Rome and worked with Pierre Subleyras. He remained there until at least 1747 and possibly until the death of his master in 1749. He must have learnt portrait painting in Rome, but he also painted landscapes, because Joseph Vernet advised him to specialize in this genre.