The Classical period also saw an increase in the use of statues and sculptures as decorations of buildings. The temples of the Classical era included the Parthenon in Athens, and the Temple of Zeus at Olympia. They had relief sculpture for decorative friezes, and sculpture in the round to fill the triangular fields of the pediments. Most of these works survive only in fragments, for example the Parthenon Marbles, roughly half of which are in the British Museum.