Mask of Vaikuntha Vishnu, late 5th century. Learn more about 5th century masks
A prehistoric period characterised by the production and use of bronze as well as signs of urbanisation. Its commencement varies in different regions of the world, such as the Indus Valley Civilisation (3300–1300 BCE), Greece and China (c. 3000 BCE), and the United Kingdom (c. 1900 BCE). It is the second of the three-age classification of human history, preceded by the Stone Age and followed by the Iron Age. The transition from the Neolithic cultures to the Bronze Age is known as the Chalcolithic period.