The simplest form of ceramic is terracotta, a mixture of clay and water, with the addition of substances to impart the desired plasticity and cohesion. Coated ceramic is referred to as faenza (or—more commonly in English—the French derivative faïence), from the Italian town of Faenza, famous for its ceramic production since the twelfth century. The best-known variety is majolica. Two other types of ceramic are earthenware and porcelain.