Chasing and Repousse
This metal forming technique, dating back nearly 5000 years, combines two different processes: repoussé pushes metal from behind, giving the piece depth, and chasing pushes metal from the front, adding detail to the piece. These two processes are combined to form intricate, highly detailed pieces. However, These technique aren't only used on small decorative pieces, however. This is how both the face mask of the Egyptian pharaoh Tutankhamen and the Statue of Liberty were made!
Feeling that a picture is worth a thousand words, I made a video showing this amazing technique.