Pottery is the process of forming objects with clay and firing them at high temperatures. It includes earthenware, stoneware, and porcelain. Pottery is made by shaping clay and heating it in a kiln. It is one of the oldest human inventions, dating back thousands of years. Pottery can be utilitarian or artistic. There are different types of clay and firing temperatures used. Pottery can be glazed or unglazed and decorated in various ways. Historic pottery is categorized as fine or coarse wares. Cooking in clay pots was popular before metal pots became available.