In the middle of the 18th century, Europe began to move toward a new style in architecture, literature, and the arts, generally known as Classicism. This style sought to emulate the ideals of Classical antiquity, especially those of Classical Greece. Classical music used formality and emphasis on order and hierarchy, and a "clearer", "cleaner" style that used clearer divisions between parts (notably a clear, single melody accompanied by chords), brighter contrasts and "tone colors" (achieved by the use of dynamic changes and modulations to more keys). In contrast with the richly layered music of the Baroque era, Classical music moved towards simplicity rather than complexity. In addition, the typical size of orchestras began to increase, giving orchestras a more powerful sound.