This is a Copper panel that is created by a process of metalworking called repousse . Repousse is a technique that has been practiced since the dawn of time.The work involves using small steel punches and chisels to raise volume from the back of the material . The material is backed up with a pine resin compound called pitch to support the copper as it is being worked . The Front of panels are then chased with hammer and chisels to bring life and detail to the design .If you are interested in the art of Repousse and want to learn from a Master , please look up Valentin Yotkov online at http://www.valetinyotkov.com.
He is a wonderful guy as well as a superb teacher !