Samuel Birch, History of Ancient Pottery: Greek…
“ It must never be forgotten that vase-painting is essentially a decorative art; but, as we shall see later in tracing its historical development, there is always a tendency to ignore the essential subserviency of design to use, and to give the decoration a more pictorial character. Many of the late vases are, in fact, pictures on terracotta. Again, there is a class of fifth-century vases with polychrome paintings on white ground which actually recall the method we know to have been employed by the great master of that century, Polygnotos. ”
