By the classical period, roughly the 5th and 4th centuries, monumental sculpture was composed almost entirely of marble or bronze; with cast bronze becoming the favoured medium for major works by the early 5th century; many pieces of sculpture known only in marble copies made for the Roman market were originally made in bronze. Smaller works were in a great variety of materials, many of them precious, with a very large production of terracotta figurines. The territories of ancient Greece, except for Sicily and southern Italy, contained abundant supplies of fine marble, with Pentelic and Parian marble the most highly prized. The ores for bronze were also relatively easy to obtain.