What medium is "Portrait of a man, possibly La Mothe Fénélon (1651–1715)"?

Portrait of a man, possibly La Mothe Fénélon (1651–1715) is Painted enamel on copper, partly gilt.

Is "Portrait of a man, possibly La Mothe Fénélon (1651–1715)" in the public domain?

Yes, Portrait of a man, possibly La Mothe Fénélon (1651–1715) is in the public domain and available for free download under CC0 license.

This artwork was created probably 19th century.

Unknown Artist

probably 19th century

Medium

Painted enamel on copper, partly gilt

Dimensions

H. 2 1/2 in. (6.4 cm.); W. 2 in. (5.1 cm.)

Classification

Enamels

Culture

German or French

Department

European Sculpture and Decorative Arts

Museum

Metropolitan Museum of Art, New York, NY

Credit

Bequest of Mary Martin, 1938

Accession Number

38.145.214