A merchant is a person who trades in commodities produced by other people, especially one who trades with foreign countries. Merchants have been known for as long as humans have engaged in trade and commerce. Merchants and merchant networks operated in ancient Babylonia, Assyria, China, Egypt, Greece, India, Persia, Phoenicia and Rome. During the European medieval period, a rapid expansion in trade and commerce led to the rise of a wealthy and powerful merchant class. The European Age of Discovery opened up new trading routes and gave European consumers access to a much broader range of goods. By the 18th century, a new type of manufacturer-merchant had started to emerge and modern business practices were becoming evident.