from 1809 he worked only on portraits, specializing in miniature painting on ivory, and small gouaches on paper. in 1812 was employed as a portraitist by the austrian foreign minister klemens von metternich and became curator of the extensive portrait collection of metternich's third wife princess melanie. in 1819 he painted a portrait of metternich's daughter, klementine, posed as the goddess hebe. he was influenced by jean-baptiste isabey and even more strongly by the english portrait painter thomas lawrence, who visited vienna in 1819. in his late years he concentrated on the painting of flowers.