German Art Deco round geometric design pyrography treenware cuff link box. Treen, literally "of a tree" is a generic name for small handmade functional household objects made of wood. Pyrography is the art of decorating with burn marks resulting from the controlled application of a heated metal object. The term means "writing with fire", from the Greek pur (fire) and graphos (writing). After the design is burned in, wooden objects are often coloured.