 One of his best productions is the ""Approaching Storm in the Campagna"" (1862).Among others may be mentioned ""Via Appia"", in the Kunsthalle at Hamburg, a fine ""Italian Landscape"" (1856), in the Ravené Gallery, Berlin, and ""View of Cumæ"" (1881), in the National Gallery in Berlin.In 1900 the title of professor was conferred upon him.