Sculpture in Scotland includes all visual arts operating in three dimensions in the borders of modern Scotland. Durable sculptural processes traditionally include carving (the removal of material) and modelling (the addition of material), in stone, metal, clay, wood and other materials. In the modern era these were joined by assembly by welding, modelling, moulding and casting. Some installation art can also be considered to be sculpture. The earliest surviving sculptures from Scotland are standing stones and circles from around 3000 BCE. The oldest portable visual art are carved-stone petrospheres and the Westray Wife is the earliest representation of a human face found in Scotland. From the Bronze Age there are extensive examples of rock art, including cup and ring marks and elaborate ca