repoussé (reh-poo-SAY) n. a metalworking technique whereby a malleable metal is embossed, shaped, or ornamented by punching or hammering from the reverse side.
Derived most recently from the French language, the word repoussé means "pushed up," and earlier the word has origins from Latin verb pulsare, which means "to push." These days Gold and silver are most commonly used for repoussé efforts, while copper, tin, and bronze have been used in the more distant past.
I came across the term repoussé while thumbing through a copy of Gardner's Art Through the Ages: The Western Perspective. In the book I noticed a famous example of classical repoussé techinques that might be familiar to readers:
Left: Mask of Agamemnon
Depicted in the image is a Mycenaean funerary mask that dates back to approxiamtely 1600 CE. The so-called Mask of Agamemnon is an artifact discovered at Mycenae by archaeologist Heinrich Schliemann in 1876.
While Schliemann's skills as an archaeologist left much to be desired, he certainly knew quality when he laid his eyes upon it, and the Mask of Agamemnon is among the world's finest treasures, repoussé or otherwise.