Compare with a similar miniature by Adolf Theer, illustr. in Heinrich Fuchs, Die Österreichische Bildnisminiatur, Vienna 1982, vol. II, p. 130, nr 20.
Ferdinand (1793-1875), son of Emperor Francis II of Austria and his second wife Maria-Theresia of Bourbon-Naples, succeeded his father as Emperor Ferdinand I of Austria in 1835 and abdicated in 1848 in favour of his nephew Franz-Joseph. In 1831, he married Princess Anna of Savoy, daughter of King Victor Emmanuel of Sardinia, but died without issue.