champlevé

(French: “raised field”).  An enamel technique in which hollows are carved, die-struck or cast in the surface of a metal object. These hollows are filled with enamel and fired until the enamel fuses, then the object is polished. Pronunciation here.

Plaque with the Calling of Saints Peter and Andrew

Plaque with the Calling of Saints Peter and Andrew. Gilded copper with champlevé enamel. 1160-1180. Metropolitan Museum of Art, New York.